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In an experiment conducted at the Weld Hill Research and Education Building, Cat Chamberlain examined the effects of false springs on eight deciduous tree and shrub species, for a total of 480 seedlings. Jon Hetman
Cat Chamberlain in the Weld Hill Research Building Greenhouses

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Recent News

Jake Grossman accepts Assistant Professorship at Swarthmore College

May 4, 2020

Starting Fall semester, Jake J. Grossman, Putnam Fellow, will be a Visiting Assistant Professor of Ecology at Swarthmore College. He will teach a general ecology course, team-teach introductory biology, and mentor student researchers. Congratulations Jake!


Hopkins receives grant to study how plants choose mates

December 13, 2019

Robin Hopkins recently received a major grant from the National Science Foundation to illuminate how plants select their mates, using phlox to identify the molecular signals triggered by pollination.

Jacob Suissa passes preliminary exam

September 26, 2019

Jacob Suissa passed his preliminary exam, becoming an official PhD candidate in the Friedman Lab. Congratulations Jacob!

Matt Fertakos awarded Undergraduate Research Prize

August 7, 2019

2018 DaRin Butz Intern Matthew Fertakos was selected as a 2019 Undergraduate Research Prize (URP) recipient by ASPT for his work on North American chestnuts with Dr. Wendy Clement at the College of New Jersey and Dr. Elizabeth Spriggs, Arnold Arboretum Putnam Fellow.

El último misterio que persiguió a Darwin

August 6, 2019

Un misterio persiguió a Darwin hasta sus últimos días. ¿Cómo habían surgido las flores? ¿Cómo se habían dispersado y diversificado tan rápido? ¿La naturaleza daba saltos? De ser así toda su teoría podía estar en peligro. Esto y muchas otras cosas sobre ese “misterio abominable” lo podéis encontrar en el artículo basado en el trabajo de William Friedman.

Flowering time in Viburnum

June 7, 2019

In the American Journal of Botany, Arboretum Putnam Fellow, Elizabeth Spriggs and colleagues investigated closely related species of Viburnum using sequencing and herbarium specimens. They found that flowering time differences helped maintain separation of species in populations growing in close proximity. Abstract»

Predicting early spring budburst with genetics against a climate change backdrop

May 8, 2019

In experiments conducted at the Arboretum, Elizabeth Wolkovich and colleagues showed that plant genetics can help provide more accurate predictions of when plants will break bud in spring as climate change progresses.

Risks of false spring

April 18, 2019

In Global Change Biology, Cat Chamberlain, Elizabeth Wolkovich, and colleagues reviewed studies and metrics for measuring false spring and freeze damage risk, and suggest an integrated approach for modeling future outcomes. Abstract»

Arboretum announces 2019 research awardees

April 16, 2019

Each spring the Arnold Arboretum awards funding to a number of independent research projects submitted by students, post-doctoral researchers, and biological and horticultural science professionals.

Robin Hopkins receives NSF grant to study speciation

April 15, 2019

A major NSF grant to enhance research, teaching, and public information on topics related to biological diversity has been awarded to Robin Hopkins .

Franchesco Molina earns his doctorate

April 1, 2019

Franchesco Molina in the Hopkins Lab passed his PhD defense on adaptation in Arabidopsis arenosa. Congratulations Dr. Molina!

Graduate researcher becomes PhD candidate

March 1, 2019

Austin Garner passed his preliminary exam, becoming an official PhD candidate in the Hopkins Lab. Congratulations Austin!

Precocious flowering and vascular function

February 11, 2019

As a Putnam Fellow, Jessica Savage focused on how the vascular system influences the timing of flowering in trees. Published in American Journal of Botany, her research shows that trees that flower before they leaf out invest more resources for flower development the previous year rather than in the spring before the vascular system is fully functional. Abstract»

Experimental design recommendations

February 1, 2019

Published in Ecology Letters, Ailene Ettinger, Isabelle Chuine, Elizabeth (Lizzie) Wolkovich, and colleagues analyze experiments that manipulate climate and share recommendations for experimental design in future climate change research. Abstract»

A growing role as a living lab

January 17, 2019

For scientists like Andrew Groover, the Arnold Arboretum offers direct access to a diversity of living plants, associated data, and laboratory resources that otherwise would be daunting to find in one location. Harvard Gazette»

Polyploid populations

January 1, 2019

The process of whole-genome duplication, or polyploidy, plays an important role in the formation of new species. Franchesco Molina‐Henao and Robin Hopkins examined this role in diploid and polyploid populations of Arabidopsis arenosa in new work published in American Journal of Botany. Abstract»


Trapped for a noble cause

October 3, 2018

Harold Suárez-Baron, a PhD candidate at the University of Antioquia in Colombia, received a Deland Award at the Arnold Arboretum to study Dutchman’s pipevines (Aristolochia), particularly their unusual mechanism for attracting and retaining flies for pollination.

Complex responses to phenological cues

August 1, 2018

Understanding the role of different cues, like temperature and chilling, is important to predict how plant phenology, or the timing of life cycle events, will respond to climate change. Published in New Phytologist, Dan Flynn and Elizabeth (Lizzie) Wolkovich manipulated various cues using a growth chamber to understand this complex process. Abstract»

Diversity in wind-pollinated plants

June 28, 2018

While floral diversity has been studied extensively in animal-pollinated plants, much less is understood about why wind-pollinated plants also exhibit diversity in reproductive structures. Published in Annals of Botany, Juan Losada, Fellow of the Arnold Arboretum, and Andrew Leslie, Assistant Professor at Brown University examined this diversity in conifers. Abstract »

Marjorie Lundgren awarded grant

May 25, 2018

Dr. Marjorie Lundgren, a postdoctoral research associate at MIT and visiting fellow of the Arnold Arboretum, won a British Ecological Society Small Research Grant for a project exploring perenniality in Brachypodium grasses, in collaboration with Professors David Des Marais of MIT and Barry Logan of Bowdoin College. Congratulations Marjorie!

Robin Hopkins receives teaching award

May 23, 2018

Robin Hopkins was awarded the Harvard Fannie Cox Prize for Excellence in Science Teaching. This awards recognizes Robin’s dedication to teaching complex concepts in life sciences while inspiring her students to pursue science careers. Congratulations Robin!

Reinforcement in Phlox

May 20, 2018

In new work published in Evolution, postdoctoral fellow Sevan Suni and Robin Hopkins focus on the process of speciation in Phlox by examining the relationship of reproductive isolation and process of reinforcement. Abstract »

Ben Goulet receives award

May 1, 2018

Ben Goulet, PhD Candidate in the Hopkins Lab, received a 2018 Graduate Research Excellence Grant, the Rosemary Grant Advanced Award, from the Society for the Study of Evolution (SSE). Congratulations Ben!

Genetic mechanisms of reinforcement

May 1, 2018

Published in Gene, Austin Garner with colleagues Ben Goulet, Matt Farnitano, Francesco Molina, and Robin Hopkins, review the process of reinforcement, the evolution of traits that prevent costly hybridization. The review article focuses on how genomics can be leveraged to understand reinforcement. Abstract »

In plant tug-of-war, mom wins

March 15, 2018

Arboretum scientists have pinpointed how mother plants of a water lily species take control of rearing offspring, part of a 25-year quest to understand how mothers and fathers interact in the creation of a flowering plant seed. Harvard gazette»

Catapulting pollen

March 1, 2018

Supported by a Sinnott Award, Callin Switzer with colleagues Robin Hopkins and Stacy Combes examined the unique method of pollination in mountain laurel. With the anther filaments acting as catapults, the pollen reaches speeds of 8 miles per hour, making it one of the fastest moving plants in the world! Abstract » Harvard Gazette »

Expanding the reach of the bionic leaf

February 3, 2018

Scientists estimate that food supplies will need to double by 2050 to meet demand. In greenhouse experiments conducted at the Arnold Arboretum, Harvard researchers discovered a way to more than double crop size by introducing a soil bacterium that converts nitrogen from the atmosphere into robust and sustainable fertilizer. Harvard gazette»

The future of wine grapes

January 8, 2018

Most wine is produced from the same 12 varieties of grapes, a huge concern for growers in the face of climate change. Published in Nature Climate Change, Elizabeth Wolkovich, Ignacio Morales-Castilla, and colleagues discuss how the other ~1100 varieties of grapes and the diversity of their attributes may play an important role in the future. Read more »

The future of wine grapes

January 8, 2018

Most wine is produced from the same 12 varieties of grapes, a huge concern for growers in the face of climate change. Published in Nature Climate Change, Elizabeth Wolkovich, Ignacio Morales-Castilla, and colleagues discuss how the other ~1100 varieties of grapes and the diversity of their attributes may play an important role in the future. Read more »

Phloem vascular network

January 8, 2018

Juan Losada (Arboretum Fellow) and colleagues review what is known about the phloem network responsible for sugar transport. The work is published in Current Opinion in Plant Biology. abstract »


Reproductive development in pawpaw

December 15, 2017

While the pawpaw (Asimina triloba) is one of few native North American fruit trees, not much is known about its flower and fruit development. Juan Losada (Arboretum Fellow), Iñaki Hormaza, and Jorge Lora (Jewett Prize Recipient) examined its development in American Journal of Botany. Complementing this work, the genome of Asimina triloba 12708*A is being sequenced with support from an Arboretum Sequencing Award. abstract »

Tall trees and sugar transport

December 8, 2017

New research in Nature Plants by Jessica Savage, Juan Losada, and Missy Holbrook finally answers the long standing question of how trees maintain efficient sugar transport as they grow taller. They found that the phloem structure, the vascular tissue that transports carbohydrates, changes with increasing height. abstract » Harvard Gazette»

Watch Arboretum Research Talks LIVE online

October 26, 2017

The Arboretum is pleased to announce that you now have a choice in how you watch Arboretum Research Talks. Starting on Monday at 12:10pm, you can attend a talk in person or you can watch live on the Arboretum’s YouTube channel. Research talks dive deep into the data and are free and open to the public.

Austin Garner awarded fellowships

August 23, 2017

Austin Garner is a PhD student in the Hopkins Lab starting this Fall. Austin was awarded both the Herchel Smith Graduate Fellowship from Harvard University and the National Science Foundation Graduate Research Fellowship to support his doctoral studies. Congratulations Austin!

Reconstructing the ancestral flower

August 7, 2017

The early evolution of flowers remains something of a mystery. As part of her Master’s research, Kristel Schoonderwoerd, PhD Candidate in the Friedman Lab, joined a large international team to reconstruct the ancestral flower based on DNA and floral characteristics of known flowers. The results are published in Nature Communications. more » abstract»

Phenology and wine grapes

August 2, 2017

Published in Journal of Ecology, Elizabeth Wolkovich and colleagues review how natural phenological diversity present in different wine varieties may positively impact the response to a changing climate. abstract »

Becky Povilus earns her doctorate

July 27, 2017

Rebecca Povilus from the Friedman Lab passed her PhD defense on reproduction and seed development in water lilies. Next up for Becky is a post-doctoral position in the Gehring Lab at the MIT Whitehead Institute. Congratulations Dr. Povilus!

Dave Des Marais accepts faculty position

July 25, 2017

David Des Marais, Senior Fellow of the Arnold Arboretum and Research Associate in the Department of Organismic and Evolutionary Biology at Harvard, has accepted a tenure-track assistant professorship in the Civil and Environmental Engineering Department at MIT. Starting in October, he will be the first plant biologist in the department. Congratulations Dave!

Response to environmental stresses

June 22, 2017

New research by Dave Des Marais and coworkers examined the gene expression networks involved in the response to cold and drought stress. Published in Proceedings of the Royal Society B, they showed that the relationships of genes in these networks affect how plant populations respond and adapt to their environment. abstract »

Austrobaileya embryogenesis

June 20, 2017

Juan M. Losada, Julien Bachelier and William (Ned) Friedman examined embryo development in Austrobaileya scandens, an early diverging angiosperm (flowering plant). They discuss the large seed size and prolonged duration of development in new work published in New Phytologist. Flowering video » abstract »

History of plant introductions from Japan

June 2, 2017

In new work published in Botanical Review, Senior Research Scientist Emeritus Peter Del Tredici details the history and the role of three horticulturists in introducing new plants from Japan to North America during the mid-1800s. abstract »

Taking the pulse of the planet

May 24, 2017

With the eye, the drone and the satellite, researchers, Margaret Kosmala, David Basler (Sinnott and Sargent Awardees), Richard Primack and Eli Melaas (Boston University) are looking closely at individual trees to track changes in phenology (life events like leafing out) due to climate change. Read more at

Friedman Lab awarded research grant

May 19, 2017

Kristel Schoonderwoerd and William (Ned) Friedman were awarded the Dean’s Competitive Fund for Promising Scholarship for their project to examine leaf initiation and function with a micro-CT scanner. Congratulations!

Callin Switzer earns his doctorate

May 18, 2017

Callin Switzer from the Hopkins Lab passed his PhD defense making him the first Arboretum graduate student to earn his doctorate. Callin has accepted a postdoctoral fellowship in the eScience Institute at the University of Washington. Congratulations Dr. Switzer!

Graduate researchers become PhD candidates

April 28, 2017

Ben Goulet and Kristel Schoonderwoerd passed their preliminary exams, becoming official PhD candidates in the Hopkins Lab and Friedman Lab. Congratulations Ben and Kristel!

Suvan Suni accepts faculty position

April 10, 2017

Sevan Suni, postdoctoral fellow in the Hopkins Lab, will join the biology department at the University of San Francisco, in San Francisco CA as a tenure track assistant professor in January 2018. Congratulations Sevan!

Asymmetric gene flow in Phlox

April 1, 2017

Federico Roda, Robin Hopkins and colleagues used genomic analyses to examine the role of gene flow in flower color divergence in Phlox drummondii. Comparing transcriptomes between four Phlox species, they found asymmetric gene flow consistent with the asymmetric morphological divergence in flower color. The results are published in Molecular Ecology. abstract »

Arnold Arboretum Announces 2017 Fellowships and Awards Recipients

March 31, 2017

Each year, the Arnold Arboretum selects a number of exciting independent research projects to support through its diverse array of endowed fellowship and award funds. The 2017 Fellows and Awardees are students, post-doctoral researchers, and biological and horticultural science professionals whose studies will utilize Arboretum plants, records, herbaria, library collections, or expertise.

A Thirst for Knowledge

March 25, 2017

Studying stem samples from a suite of 30 deciduous, flowering plant species collected in the Arboretum, Putnam Fellow Kasia Ziemińska is illuminating how plants store and regulate water, particularly under drought stress.

Honorable mention for Ben Goulet

March 17, 2017

Ben Goulet, PhD candidate in the Hopkins Lab, received honorable mention for his NSF GRFP proposal to study hybrid speciation in Phlox. Congratulations Ben!

Complex plant responses

February 28, 2017

Published in New Phytologist, Dave Des Marais and coworkers explored the ability of plants to respond to multiple environmental cues experienced simultaneously. Examining 35 natural varieties of the grass Brachypodium distachyon grown under differing environmental conditions, they found that the response to a single cue did not directly predict the response to multiple cues. abstract »

Hybridization in plants

January 15, 2017

In a review paper published in Plant Physiology, Ben Goulet, Federico Roda and Robin Hopkins discuss the rich history of hybridization in plants bringing together classical experiments with new genomic techniques. abstract »

Growth strategies in eastern hemlock

January 2, 2017

Peter Del Tredici (Arnold Arboretum Senior Research Scientist Emeritus) and David Orwig (Harvard Forest Senior Ecologist) examined natural populations of eastern hemlock, Tsuga canadensis. Published in Rhodora, they found that the populations employed a layering strategy that involves changing the growth orientation of branches which rejuvenated the populations in stressful environments. abstract »


Science IRL Features Arboretum Scientists on Butterfly Behavior and Plant Evolution

October 19, 2016

How can butterfly behavior influence plant evolution? On the latest episode of Science IRL, Arnold Arboretum scientists Robin Hopkins and Heather Briggs take us through their research investigating this question. Watch the episode to get an inside look at their research into the effects of pipevine swallowtail behavior on the evolution of flower color in the wildflower Phlox!

Bumblebee behavior

September 23, 2016

Some flowers release pollen out of small pores in the anthers. Bumblebees (Bombus impatiens Cresson) coax this pollen out by vibrating their bodies (buzz pollination or sonication). In research published in Apidologie, Callin Switzer and colleagues observed bumblebees in the urban environment of the Arboretum, the rural environment of the Concord Field Station and in the greenhouse. They found that they alter their sonication behavior depending on which plants they visit and the environmental conditions. abstract »

The evolution of plant life history strategies

September 15, 2016

David Des Marais (Senior Fellow of the Arnold Arboretum) has been awarded a grant from the Department of Energy’s Joint Genome Institute to investigate the genetic basis of annual and perennial strategies in plants. Congratulations Dave! more »

What’s the buzz

September 2, 2016

Callin Switzer, a graduate student in the Hopkins Lab, captured the sounds of bumblebees in an attempt to determine the frequency at which they flapped their wings and otherwise shook their bodies.

2016 Putnam Fellow announced

July 14, 2016

Kasia Zieminska was awarded an Arnold Arboretum Putnam Fellowship. Kasia received her PhD in 2014 from Macquarie University in Sydney Australia where she worked with Mark Westoby and Ian Wright. At the Arboretum, Kasia will be studying the relationship between diversity in anatomical structure and water storage mechanisms and how this relationship influences plant biodiversity and ecological strategies. She will be focusing on ~25 diverse species in the Arboretum. Congratulations Kasia!

Complexities in soil food webs

July 11, 2016

In new work published in Soil Biology and Biochemistry, Elizabeth Wolkovich, Arboretum scientist and assistant professor in Organismic and Evolutionary Biology, reviews the complexities in soil food webs, including nutrient recycling, omnivory, and the channels through which energy and resources flow.  abstract »

New truffle species discovered at the Arnold Aboretum

June 24, 2016

In a newly published study, Rosanne Healy (2013 Sargent Award recipient) and colleagues detected eight truffle species (genus Tuber), including a brand new species previously unknown to science, in the root communities of some of our trees. To honor the location of its discovery, the truffle has been named Tuber arnoldianum. abstract» Read more in the Boston Globe.

Fungi colonization of nonnative plants

June 3, 2016

Stacey Leicht-Young (2013 Putnam Fellow), Rosanne Healy (2013 Sargent Award recipient) and Peter Del Tredici (Senior Scientist Emeritus) collaborated on a project to examine the associations of nonnative plants with the native fungal community in the field. They found that Celastrus orbiculatus Thunb. or Oriental bittersweet is colonized by native endomycorrhizal fungi, potentially aiding the ability of oriental bittersweet to move into new landscapes. abstract »

Chase Mason accepts faculty position

May 27, 2016

Chase Mason, Arnold Arboretum Putnam Fellow, has accepted a faculty position as an assistant professor in the Department of Biology at the University of Central Florida. Chase will be starting this position in the January of 2017. Congratulations Chase!

Beth Forrestel awarded NSF Fellowship

May 20, 2016

Elisabeth Forrestel was awarded a NSF Postdoctoral Research Fellowship in Biology for Interdisciplinary Research Using Collections. Working in the Wolkovich Lab, Beth will focus on the response of winegrapes to climate changes. Congratulations Beth!

Arboretum grants research awards

May 19, 2016

The Arboretum is pleased to announce the 2016 Arboretum Award recipients. Several graduate students are being supported by these awards including Alexander Susko and Jonathan Mahoney (Deland Award), Callin Switzer (Sinnott Award), Meng Li (Hu Award) and Meghna Krishnadas (Ashton Award). Adam Roddy (post-doctoral fellow at Yale University) and Danilo Fernando (Associate Professor at the State University of New York) were awarded the Jewett Prize. The research of Kuo-Fang Chung (Associate Research Fellow in Taiwan) and Dan Sullivan (Arnold Arboretum Visiting Fellow) is supported by the Sargent Award. Congratulations!

Unusual reproductive phenology

April 25, 2016

Kristel Schoonderwoerd and William (Ned) Friedman closely examined the timing and morphology of ovule and seed development in Franklinia alatamaha. They found a very unusual situation. The zygote undergoes dormancy shortly after fertilization until the following growing season. Seed development is completed an entire year after fertilization has occurred. The results are published in the Botanical Journal of the Linnean Society. abstract »

What is in a pollination drop?

April 21, 2016

Pollination drops are ovular secretions that form a landing site for pollen in many gymnosperms. Arboretum Putnam Fellow Cary Pirone-Davies and coworkers characterized both the proteins present in the pollination drops and the ovule transcriptome in Cephalotaxus. The results published in Annals of Botany, shed light on the pollination biology of Cephalotaxus. abstract »

Wine grapes and climate change

March 24, 2016

Published in Nature Climate Change (abstract»), Elizabeth Wolkovich and Ben Cook examined the phenology of wine grapes and its relationship to climate change. Using 500 years of harvest dates across France, they found that warming due to climate change is linked to much earlier harvest dates. Harvard Gazette» NPR»

Summer research opportunities

March 2, 2016

The Harvard University Center for the Environment is offering summer research assistantships for Harvard Undergraduates. With positions open in both the Friedman Lab and Wolkovich Lab at the Arboretum, students would have the opportunity to study plant responses to climate change. Interested undergraduates should apply via HUCE.


Head banging bees

December 15, 2015

The Australian bee, Amegilla murrayensis, has an unique technique to release pollen from flowers. Rather than shaking the anthers with its mandibles like the American bumblebee, it uses its head. Published in Arthropod-Plant Interactions, Callin Switzer and colleagues compared the pollination behavior of the two bees. abstract »

Giant Pumpkins

November 2, 2015

Giant pumpkins can grow to be more than 2000 pounds. Arnold Arboretum Putnam Fellow Jessica Savage was interviewed for the Smithsonian, NPR-WHYY and Botanist in the Kitchen Blog about her research on how pumpkins are able to grow so large from a plant physiological viewpoint.

Tree ring predictions

October 1, 2015

In the current issue of Silva, Ailene Ettinger, Arnold Arboretum Putnam Fellow, discusses her research using tree rings to predict the response of different tree species to climate change. pdf »

Summer course highlighted

September 23, 2015

“Plant Anatomy 2015: Development, function and evolution”, the summer course sponsored by the Arnold Arboretum and microMORPH, was featured in the newsletter of the International Association of Wood Anatomists Journal. pdf »

Climate test for forests

September 23, 2015

Research led by Elizabeth Wolkovich and Dan Flynn was highlighted in the Harvard Gazette. Using growth chambers, they examined the response of 28 different tree species from northeastern forests to climate change. Harvard Gazette»

Phloem and plant ecology

July 20, 2015

Phloem plays a crucial role in carbon transport and allocation but little is known about how it impacts the interaction of plants with the environment. As lead author in a review article in Plant, Cell, and Environment, Jessica Savage, Arnold Arboretum Putnam Fellow, highlights current research and details the importance of phloem physiology in plant ecology. more » abstract »

BSA Student Representative

June 5, 2015

Rebecca Povilus, PhD candidate in the Friedman Lab, was elected as the student representative to the executive board of the Botanical Society of America (BSA). Congratulations Becky!

2015 Putnam Fellow announced

May 1, 2015

Chase Mason was awarded an Arnold Arboretum Putnam Fellowship. Chase received his PhD in 2015 from the University of Georgia. At the Arboretum, Chase will study the evolution of leaf physical and chemical defenses in relation to the leaf economics spectrum (LES), habit, and species’ source climate across 16 woody genera. LES relates the initial investment of carbon during leaf development with the net carbon gain of that leaf. Plants employ various LES strategies which impacts their adaptability to environmental conditions and stresses. Congratulations Chase!

Jessica Savage accepts faculty position

April 29, 2015

Arnold Arboretum Putnam Fellow Jessica Savage has accepted a faculty position as an assistant professor in the Department of Biology at the University of Minnesota, Duluth. Jessica will be starting this position in the Fall of 2016. Congratulations Jessica!

2015 Arboretum Award recipients

April 19, 2015

The Arboretum is pleased to announce the 2015 Arboretum Award recipients. Graduate students supported by the awards include Steve Decina from Boston University (Deland Award) and Nalaka Geekiyanage from Kyoto University in Japan (Ashton Award). Jianhua Li, associate professor of biology at Hope College and Luke Keogh, post-doctoral fellow at the Rachel Carson Center for Environment and Society at the Ludwig-Maximilians University in Germany were awarded the Sargent Award. Congratulations!

Phenology research on grapes

April 8, 2015

Highlighted in the Harvard Gazette, Elizabeth Wolkovich discusses her research on the different varieties of grapes, Vitis vinifera ssp. vinifera. Examining their phenological diversity, she hopes to shed light on how they will respond to climate change.

Welwitschia focus of two articles

February 24, 2015

Welwitschia was the subject of two articles by William (Ned) Friedman published in the American Journal of Botany. In one, Ned describes the development of the female reproductive structures and fertilization in Welwitchia. In the companion commentary, he discusses the evolving names of these structures throughout history.  abstract » pdf »

NSF grant

January 25, 2015

Rebecca Povilus was awarded a National Science Foundation Doctoral Dissertation Improvement Grant (NSF DDIG). Congratulations Becky!

DaRin Butz Foundation

January 24, 2015

Putnam Fellows Ailene Ettinger and Jessica Savage both received funding from the DaRin Butz Foundation. The funding will support hiring undergraduate students to help with their research. Congratulations Ailene and Jessica!

Funding for research programs

January 24, 2015

Elizabeth Wolkovich and Robin Hopkins were awarded funding from the William F. Milton Fund to support their research programs. Congratulations Lizzie and Robin!

Giant pumpkins

January 24, 2015

Gracing the cover of Plant, Cell & Environment and featured in BBC Earth, Jessica Savage, Arnold Arboretum Putnam Fellow, and co-workers examined anatomical features and carbon transport to determine how giant pumpkins become so large. more » abstract »

New article in Biological Conservation

January 24, 2015

Arnold Arboretum Putnam Fellow Ailene Ettinger and colleagues examine the untapped value of citizen scientists to biodiversity research in Biological Conservation. more » abstract »


Examining functional divergence

December 1, 2014

David Des Marais and co-researchers dissected sequence variation between alleles of a regulatory protein in Arabidopsis and uncovered functional divergence in response to environmental conditions. The results are published in Molecular Biology and Evolution. more » abstract »

Biology of water lilies

December 1, 2014

Published in Annuals of Botany, new work by Rebecca Povilus, Juan Losada, and William (Ned) Friedman delves into the floral and seed biology of the water lily, Nymphaea thermarum, an ancient linage of flowering plants. more » abstract »

Ginkgo microbiome

November 21, 2014

Published in Environmental Microbiology, William (Ned) Friedman, Peter Del Tredici and colleagues examined the diversity in the microbial community that is present in Ginkgo biloba trees. They found diverse populations of bacteria in different locations within the tree (i.e. bark, leaf, branch, trunk). abstract »

Floral receptivity

November 21, 2014

Juan Losada, William (Ned) Friedman, and colleagues examined the processes of floral receptivity in Magnolia virginiana. They found that there was a precise window of time, marked by specific secretory proteins, in which the stigma (female) was receptive to the pollen (male). This work was published in American Journal of Botany. abstract »

Community roles in evolution

September 21, 2014

In work published in Nature and highlighted in News and Views, Dan Flynn and colleagues showed that the processes of evolution and ecology are intertwined. In experimental plots of mixed or monocultures, they found that evolutionary changes were community dependent. abstract »

Reproductive isolation

September 15, 2014

Robin Hopkins and co-authors combined population genetics and field work to quantify the role of selection in reinforcement of reproductive isolation in the Texan wildflower, Phlox drummondii. Published in Current Biology, this study was the first to quantify this role in nature. more »abstract » Harvard Gazette »

Variation in response to stress

September 15, 2014

In natural populations, there is variation in gene expression. David Des Marais and co-researchers examined if variation in response to abiotic stress was important for local adaptation to environmental conditions. The results are published in Molecular Biology and Evolution. more » abstract »

Best talk

September 10, 2014

Jessica Savage, Arboretum Putnam Fellow, was awarded the Plant, Cell and Environment Postdoc Award for her talk at the Ecology Society of America (ESA) annual meeting. This award is to “to recognize significant advancements in physiological ecology.” Congratulations Jessica!

Temporal ecology

September 10, 2014

Time is an important aspect of any system. In Ecology Letters, Elizabeth Wolkovich and colleagues propose that anthropogenic climate change should be considered in light of time as accelerated climate change. Thus, temporal ecology needs to be integrated with studies focusing on spacial ecology to provide predictive frameworks of changing ecological systems. more » abstract »

Interview with Robin Hopkins

September 1, 2014

In an interview in Silva, Robin Hopkins discusses her research and what drives her interests in plants, biodiversity, and the process of speciation.

Crabapple database

September 1, 2014

Ling Guo is a curator at the Beijing Botanic Garden and a Jewett Prize recipient. She describes her work utilizing the Arboretum’s Malus collection to improve the databases of ornamental crabapples as a Registration Authority in Silva.

Genome diversity

August 21, 2014

Published in Plant Journal, David Des Marais and colleagues examined genome diversity in six distinct lines of Brachypodium distachyon, a model system for grasses. more » abstract »

Importance of plant phenology

August 15, 2014

In a commentary for New Phytologist, Elizabeth Wolkovich and Ailene Ettinger discuss the increasing importance of plant phenology research in understanding global climate change. They also point out the untapped value of arboreta and botanic gardens as a rich resource for plant phenology research with tremendous biodiversity in a common environment. abstract »

Pawpaw biology

July 21, 2014

Iñaki Hormaza, Visiting Scholar from La Mayora Experimental Station in Malaga, Spain, details the history, ecology and biology of the pawpaw (Asimina triloba) in Arnoldia. Producing sweet and highly nutritious fruit, this North American tree is not well known. df »

Temperate zone lianas

July 21, 2014

In the current issue of Arnoldia, Stacey Leicht Young, Arnold Arboretum Putnam Fellow, examines lianas (woody vines) in the North American Temperate Zone. She describes their habits, ecology, and Asian relatives.

Best student presentation

July 15, 2014

Rebecca Povilus was awarded the Katherine Esau Award for best student presentation from the Developmental and Structural Section at the Botanical Society of America’s – Botany 2014 conference. Congratulations Becky!

Climate change and urban trees

July 10, 2014

Ailene Ettinger, Michael Dosmann and others discuss how climate change will affect urban trees on WGBH news. more »

Ascribing value to biodiversity

June 22, 2014

Published in the Journal of Biosciences, Cam Webb and colleagues discuss the difficulties of ascribing value to biodiversity and the link between biodiversity, evolution and sustainability issues. abstract »

Grants-in-Aid Award

June 1, 2014

Harvard undergraduate Sally Gee was awarded a Grants-in-Aid Award. Working on a summer research project with Ailene Ettinger and Elizabeth Wolkovich, Sally will focus on collecting and analyzing trait data from various trees at the Arboretum. Congratulations Sally!

Interview with Elizabeth Wolkovich

May 1, 2014

Elizabeth Wolkovich discusses the arrival of spring, climate research and more in a interview with the Harvard Gazette.

Liana research

April 25, 2014

Arnold Arboretum Putnam Fellow Stacey Leicht Young describes her current research on lianas (woody vines) in Silva.

Flowering in Magnolia

April 22, 2014

Juan Losada describes flowering in Magnolia, from floral evolution to reproduction, in the current issue of Arnoldia.

Putnam Fellowship awarded

April 21, 2014

Ailene Ettinger and Jessica Savage were awarded Arnold Arboretum Putnam Fellowships. Congratulations!

2014 Arboretum Award recipients

March 19, 2014

The Arboretum is pleased to announce the 2014 Arboretum Award recipients. Several graduate students are being supported by these awards including Laura Garrison and Kristel Schoonderwoerd (Deland Award), Bryan Connolly ( Cunin/Sigal Award), Meng Li (Hu Award) and Janice Chan (Ashton Award). Ling Guo, curator at the Beijing Botanic Garden, was awarded the Jewett Prize. Andrew Groover, geneticist at the USDA Forest Service, is supported by the Sargent Award. Congratulations!

Invasion models

March 15, 2014

Published in AoB Plants, Elizabeth Wolkovich and colleagues examine the links between phenology, functional traits and the role of stress during a growing season in order to develop models to predict the drivers of successful invasion. abstract »

Allelic variation and water use

February 22, 2014

Published in Proceedings of the National Academy of Sciences, David Des Marais and colleagues identified an interesting role of allelic variation in driving variation in water use efficiency. Comparing two natural genotypes of Arabidopsis thaliana, they found that a single amino acid substitution in the protein, MPK12,resulted in differing responses to environmental cues. abstract » alt »

Predicting plant phenology

February 10, 2014

Elizabeth Wolkovich was chosen as a runner-up for the New Phytologist Tansley Medal. This award honors scientists who have made outstanding contributions to their field within five years of receiving their Ph.D. Congratulations Lizzie! more » In an accompanying minireview, Lizzie and colleagues focused on recent interest in integrating independent studies in ecology, climate science and evolution to better predict plant phenology. abstract »

Arboretum Senior Scientist Peter Del Tredici Retires

January 16, 2014

After 35 years at the Arboretum, senior research scientist Peter Del Tredici is retiring. Congratulations Peter! Fortunately for us, as a Senior Scientist Emeritus, Peter will still be an active Arboretum participant as he brings his students to the Arboretum and attends research talks.

Reproductive biology in apple

January 15, 2014

In order for fertilization to occur, the pollen tube must maneuver through various maternal tissues as it travels from the stigma to the embryo sac. In the current issue of BMC Plant Biology, Juan Losada and María Herrero examined the characteristics of pollen tube growth and its interaction with maternal tissues in domesticated apple (Malus x domestica). abstract »

Arboretum annouces new faculty appointments

January 2, 2014

Robin Hopkins and Elizabeth Wolkovich joined the Arboretum as assistant professors in the Department of Organismic and Evolutionary Biology. With a joint appointment at the Arboretum, their research programs will be based at Weld Hill. Welcome Robin and Lizzie!


Natural mutants of redbud

September 23, 2013

William (Ned) Friedman introduces two natural mutants found in the Arboretum’s living collection in Arnoldia. One, Cercis canadensis, accession 10-68-B, is an eastern redbud that has developed a spontaneous mutation in flower color on a single branch. Another natural mutation is observed in Kalmia latifolia, accession 2458. The petals of this flower have been converted to stamens complete with pollen production.

2013 recipients of Arboretum Awards

August 23, 2013

In the current issue of Silva, Faye Rosin introduces the 2013 recipients of the Arnold Arboretum fellowships and awards which foster independent and collaborative research using the collections.

Flower development in apple

July 23, 2013

Featured on the cover of Annals of Applied Biology, Juan Losada and María Herrero examined multiple factors influencing flowering and fruit development in Malus (apples). Of the factors examined, they found that the programic phase (the time between pollination and fertilization) was the most important for final fruit set. abstract »

Putnam Fellow announced

June 23, 2013

Stacey Leicht Young was awarded an Arnold Arboretum Putnam Fellowship. Stacey will examine the ecological and reproductive strategies required for lianas (woody vines) to be successful in its environment utilizing the Arboretum’s Leventritt Shrub and Vine collection.

Funding for symposium on genomes of trees

June 15, 2013

William (Ned) Friedman and Andrew Groover received funding from New Phytologist to host a symposium entitled “The Genomes of Trees – New Frontiers in Forest Biology”. The symposium will be hosted at the Arnold Arboretum in Spring 2015. Congratulations!

Orobanchaceae phylogeny

May 20, 2013

On the cover of American Journal of Botany, Sarah Mathews and coworkers shed light on the phylogeny of the Orobanchaceae. Many members of this plant family are either hemi- or holoparasitic, meaning that they rely on hosts for part or all of their lives. The phylogenetic results showed that there was single origin of parasitism. abstract »

Hackathon for phylogenetic information

May 10, 2013

In an effort to make existing phylogenetic information more accessible, Cam Webb participated in a hackathon. The group developed proof-of-concept software, phylotastic, that aims to allow users to build custom phylogenies based on the specific needs of the user. abstract »

Trimenia seed development

May 3, 2013

In the American Journal of Botany, William (Ned) Friedman and Julien Bachelier clarified seed development in Trimenia, a member of an ancient lineage of flowering plants, the Austrobaileyales. Previously, it was believed that the embryo-nourishing tissues in Trimenia may include both a perisperm and an endosperm; however, this study revealed that the endosperm is the main nutrient-storing tissue. abstract »

Being a gymnosperm

April 26, 2013

Visiting Fellow Stephanie Conway explains what it means to be a gymnosperm in Arnoldia.

Measuring water-related processes in trees

April 20, 2013

Guangyou Hao, Arnold Arboretum Putnam Fellow, and colleagues describe new methods to measure water-related process, such as embolism formation and hydraulic vulnerability, directly in the trunks of large trees. Previously, these types of measurements were limited to small branches or leaves. abstract»

Pollination drop composition

April 15, 2013

Published in Applications in Plant Sciences, Arboretum Putnam Fellow Cary Pirone and colleagues extracted and identified dozens of protein classes that are present in the pollination drops of eight different gymnosperm species. These results open up a new path to understanding the function of pollination drops. abstract »

Evaluating susceptibility

April 10, 2013

A master’s student at the Harvard Extension School, Kevin Block completed his thesis evaluating the susceptibility of a new hemlock species, the Ulleung hemlock, to hemlock woolly adelgid, Adelges tsugae. Congratulations Kevin! abstract»

Peter Del Tredici to receive Veitch Memorial Medal

March 18, 2013

Peter Del Tredici will be awarded the prestigious Veitch Memorial Medal by the Royal Horticultural Society in May. Congratulations Peter!

Plant distributions

March 6, 2013

Elizabeth Ryan writes in Silva about her summer at the Arboretum as a Visiting Fellow researching plant distributions in the face of climate change.

Physiological differences in conifers

March 6, 2013

Guangyou Hao, Arnold Arboretum Putnam Fellow is studying the physiological difference between conifers that drop their leaves and those that don’t. Read about his research in Silva.

Australian collection trip

March 6, 2013

Juan Losada and John DelRosso describe their recent collecting trip to Australia in Silva. The duo collected seeds of Austrobaileya, one of the most ancient lineages of flowering plants.

Alteration of generations

February 26, 2013

William (Ned) Friedman published a perspective for Science describing new work by Sakakibara et al. in which a key gene was found to regulate the alteration of generations in the moss Physcomitrella patens. abstract »

Fertilization dynamics

February 15, 2013

Juan Losada and María Herrero examined the dynamics of the fertilization process in multiple flowers in the same inflorescence. Depending on the location within the inflorescence, there were differences in the timing and length of stigma receptivity, ensuring reproductive success in varying environmental conditions. Results are published in Scientia Horticulturae. abstract »

Seed development in maize

January 26, 2013

Chi-Chiu Wu, Pam Diggle, and William (Ned) Friedman examined the role of the relationship between the endosperm and the embryo on seed development in maize. The results are published in the Proceedings of the National Academy of Sciences. abstract »

Modeling physical traits on carbohydrate transport

January 6, 2013

Angiosperms that are less than 30 meters in height have tremendous variation in leaf size, however, the size range for plants greater than 30 meters is much narrower. By modeling the physical constraints on carbohydrate transport, Maciej Zwieniecki and Kaare Jensen developed a theory to explain these differences. The work is published in Physical Review Letters and featured in Science Now and APS. abstract »


Barcoding plant species

December 26, 2012

Barcoding plant species has enormous potential to help identify known species in forest plots and new species found in the wild. Cam Webb and colleagues published a detailed protocol in Methods in Molecular Biology detailing how to utilize barcoding for ecology and systematics.

Trichome thesis

December 20, 2012

Noeline Morrissey, a master’s student in the Friedman Lab, completed her thesis comparing the trichomes of Humulus lupulus and Humulus japonicus. Congratulations Noeline!

Ploidy level and hydraulics

December 5, 2012

In new work published in New Phytologist, Arnold Arboretum Putnam Fellow Guangyou Hao and colleagues compared the hydraulics of diploid, tetraploid, and hexaploid Atriplex canescens. They found that increased ploidy levels (extra sets of chromosomes) was associated with greater resistance to drought-induced hydraulic failure. abstract »

Phylogenetics and susceptibility risks

December 1, 2012

Cam Webb and colleagues analyzed widely available data and found host preferences, numbers, and ranges of plant pests and pathogens can be correlated with phylogenetics to assess the risk of specific plant species being susceptible to particular pests. The research is published in Evolutionary Applications.

Evolution of shoot architecture

October 26, 2012

A cover story in New Phytologist presents research by recent visiting scientist Rob Baker, Lena Hilman, and Pam Diggle focusing on the evolution of shoot architecture. Using two populations of Mimulus guttatus, they examined the molecular developmental pathways within and among populations, where genetic divergence, adaptation, and speciation occur. abstract »

Malpighiales phylogeny

October 15, 2012

Sarah Mathews, Chuck Davis, and colleagues published a new phylogeny of the Malpighiales. With an additional 12 clades, the resolution of the phylogeny was greatly increased. The results are published in Proceedings of the National Academy of Sciences. abstract »

Hemiepiphytic growth

October 1, 2012

As seedlings, some species of Ficus grow on other plants high in the canopy (an hemiepiphytic growth habit). Arnold Arboretum Putnam Fellow Guangyou Hao and colleagues tested the hypothesis that hemiepiphytic growth is an adaptation for shade avoidance, but determined that it is instead a method to avoid risks associated with terrestrial growth while they are small. Results are published in Physiologia Plantarum. abstract »

Maciej Zwieniecki accepts faculty position

September 26, 2012

Beginning a new phase of his career, Maciej Zwieniecki accepted a faculty appointment at the University of California, Davis. Congratulations Maciej!

Phylogenetic relationships of conifers

September 15, 2012

Published in the Proceedings of the National Academy of Sciences, Sarah Mathews and coworkers explored the phylogenetic relationships of conifers by including the fossil record. They found strong evidence that Northern Hemisphere lineages had higher rates of speciation and extinction compared to those in the Southern Hemisphere. abstract »

Arboretum fellowships and awards

August 26, 2012

In an interview in Silva, Faye Rosin discusses how the Arnold Arboretum fellowships and awards foster independent and collaborative research using the collections.


July 24, 2012

Julien Bachelier and colleagues examined the genetic changes leading to the loss of self-incompatibility in Arabidopsis kamchatica, a wild allotetraploid species. The results are published in PLoS Genetics. abstract »

New branch of science

July 24, 2012

A new study by William (Ned) Friedman, Peter del Tredici, and colleagues from the University of Colorado was featured in the Harvard Gazette. With help from arborist John Del Rosso, the study involved sampling Arboretum ginkgos from top to bottom in the first-ever effort to define the entire community of microbes of a tree. Harvard Gazette»

New approach for vessel research

July 20, 2012

Francesca Secchi and Maciej Zwieniecki developed a new approach to compare liquid collected from functional vessels or non-functional vessels in poplar trees (Populus nigra). This approach, published in Plant Physiology, provides new insights into the biology of recovery from drought stress. abstract »

AGPs in apples

July 10, 2012

In new research featured on the cover of Annals of Botany, Juan Losada and María Herrero focused on the secretion of arabinogalactan proteins (AGPs) and the role in the acquisition of stigmatic receptivity in domestic apples. abstract »

Plant evolution

July 7, 2012

Maciej Zwieniecki and colleague used the leaf fossil record to examine the relationship between CO2 levels and plant evolution. The results are published in the Proceedings of the National Academy of Sciences. abstract »

Best student poster

July 5, 2012

Rebecca Povilus was awarded the Best Student Poster Award (Developmental and Structural Section) at the Botanical Society of America’s (BSA) – Botany 2012 conference. Congratulations Becky!

Response of seedlings to light

July 1, 2012

Using a phylogenetic approach, Sarah Mathews and Donna Tremonte compared far-red, high-irradiance response of seedlings in new work published in the International Journal of Plant Sciences. abstract »

Living collections and evolutionary biology

June 27, 2012

In Frontiers in Plant Evolution and Development, Michael Dosmann and Andrew Groover published an article highlighting the use of living collections in evolutionary developmental biology or “evo-devo” studies. abstract »

Development in Nymplaeales

June 20, 2012

Published in the American Journal of Botany, co-authors William (Ned) Friedman, Julien Bachelier, and Iñaki Hormaza followed the developing embryo from fertilization to seed dormancy in Trithuria submersa, a tiny aquatic plant belonging to the ancient angiosperm lineage Nymplaeales. abstract »

Putnam Fellow annouced

June 12, 2012

Guangyou Hao was awarded an Arnold Arboretum Putnam Fellowship. Dr. Hao will study the differences in the structural, physiological, and mechanical properties of water transport and xylem hydraulics between evergreen and deciduous conifers.

Development in Ranunculaceae

June 6, 2012

Julien Bachelier and colleagues closely examined inflorescence and flower development in members of the Ranunculaceae (Ranunculus, Ceratocephala, Halerpestes, and Oxygraphis). The results are published in the journal Plant Systematics and Evolution. abstract »

Maciej Zwieniecki receives award

May 27, 2012

A paper published in Annals of the Missouri Botanical Garden by Maciej Zwieniecki and colleagues was awarded the William Skinner Cooper Award by the Ecological Society of America. Congratulations Maciej! abstract»

Rebecca Povilus passes prelim exam

May 20, 2012

Rebecca Povilus passed her preliminary exam, making her an official PhD candidate in the Friedman Lab. Congratulations Becky!

Trait distribution

May 15, 2012

Published in the Journal of Ecology, research by Stuart Davies and colleagues found that resource availability in soils is important for determining trait distribution and diversification within communities. abstract»

Chi-Chiu Wu passes PhD defense

April 27, 2012

A graduate student in the Friedman and Diggle Labs at the University of Colorado, Chi-Chiu Wu passed his PhD defense. His research focused on female gametophyte development and double fertilization in Balsas teosinte, a wild relative of domesticated corn, and the effect of genetic relatedness of an endosperm on maize seed development. Congratulations Chi-Chiu!

Research opportunities at the Arboretum

March 27, 2012

In Silva, Faye Rosin discusses the tremendous opportunities present at the Arnold Arboretum for research and education.

Interview with Peter Del Tredici

March 20, 2012

In an interview with Landscape Urbanism, Peter Del Tredici highlights resilience of spontaneous plants to urban conditions and their importance in providing environmental services. more »

Arboretum research awards granted

March 15, 2012

To support their research utilizing the Arboretum’s collections of living plants, herbarium specimens, and extensive library and archival resources, research awards were bestowed on Dr. Jorge Lora and Dr. Bharti Sharma (Jewett Prize), graduate student Laura Lagomarsino (Deland Award for Student Research) and Dr. Hugh McAllister and Dr. Claire Williams (Sargent Award).

Turnover in ecosystems

March 15, 2012

Using both phylogenetic and functional traits, Stuart Davies and colleagues compared turnover in the composition of two different ecosystems (disturbed vs. undisturbed). The work published in Ecology concluded that including functional data aids in predicting future compositional changes. abstract»

Tansley review

March 10, 2012

Sarah Mathews and Elena Kramer published a “Tansley review” in New Phytologist that pulls from developmental genetics to examine the evolution of seed plant reproductive structures. abstract »

Symbiotic fungi

March 7, 2012

Focusing on the role of hormone transport in the interaction with symbiotic fungi, new research by Julien Bachelier and colleagues from Switzerland was published in Nature. abstract »

Juan Losada passes PhD defense

January 27, 2012

Recent visiting scientist and Deland Award Recipient Juan Losada passed his PhD defense from the Aula Dei Experimental Station–CSIC, Spain. His graduate research focused on the events between pollination and fertilization, primarily the role of arabinogalactan proteins in pollen-pistil interactions in Malus and other genera in the Arboretum’s living collection. Congratulations Juan!

Rob Baker passes PhD defense

January 20, 2012

Recent visiting scientist Rob Baker passed his PhD defense. As a graduate student in the Diggle Lab at the University of Colorado, he focused on the evolution of shoot architecture by examining the molecular developmental pathways within and among populations, where genetic divergence, adaptation, and speciation occur. Congratulations Rob!

“New Hot Paper”

January 15, 2012

A paper on the age of Arabidopsis thaliana by Mark Beilstein, Sarah Mathews, and colleagues was highlighted at as a “New Hot Paper” in the area of plant and animal science. This means that the paper, published in October 2010, was one of the most-cited papers in this area in the last two years. abstract »


Shoot architecture differences

December 27, 2011

Arboretum Visiting Fellow Rob Baker and Pam Diggle published new work in the American Journal of Botany examining the differences in shoot architecture between two populations of Mimulus guttatus. One population has a highly branched perennial lifestyle, while plants from the other population are less branched and annual. They found that shifts in the timing of reproduction play a role in the different patterns of branching. abstract »

Malesiana e-Flora

December 20, 2011

Cam Webb and coworkers published an overview on the status of e-Flora Malesiana. Floras contain detailed treatments of plant families including taxonomy, habit and other information. The overview was published in the Gardens’ Bulletin Singapore 63: 189-195.

Embolism repair mechanisms

December 15, 2011

The transportation of water through xylem cells can occasionally be blocked by air bubbles in a process called embolism. In new work published in Plant Physiology, Francesca Secchi and Maciej Zwieniecki shed light on the mechanisms involved in embolism repair by examining global transcription profiles in poplar trees (Populus trichocarpa). abstract »

Peter Del Tredici featured in Harvard Magazine

November 27, 2011

Peter Del Tredici and his research on Ginkgo biloba was featured in Harvard Magazine. more »

Time of the cycads

October 27, 2011

New research published in Science by Sarah Mathews and colleagues reveals that the living cycads were not present during the time of the dinosaurs, but rather are only ~12 million years old. more » abstract » npr interview »

Zwieniecki co-organizing workshop

August 27, 2011

Maciej Zwieniecki is co-organizing a workshop entitled “Physics and Physiology of Phloem Transport” that will bring together physicists and biologists to tackle issues in this important phenomenon. The workshop will take place October 10-12 in Copenhagen, Denmark at the Niels Bohr International Academy in collaboration with the Center for Fluid Dynamics at the Technical University of Denmark (DTU).

Research in Bussey Brook Meadow

August 20, 2011

Peter Del Tredici discusses the importance of the long term research goals for the Bussey Brook Meadow, the Arboretum’s urban wild in Silva.

Pollination in gymnosperms

August 20, 2011

Cary Pirone, Arboretum Putnam Fellow, highlights her research on pollination in gymnosperms in Silva.

Gauging Forest Changes

July 29, 2011

The NSF-funded “Analytical Workshop and Symposium” in China organized by CTFS-SIEGO is bringing together more than 60 researchers and students from 16 countries. The participants will analyze data to answer questions about forest ecology. more »

Zwieniecki named Specialty Chief Editor

July 5, 2011

Maciej Zwieniecki was named a Specialty Chief Editor for the online open access journal Frontiers in Plant Biophysics and Modeling. In an accompanying article, he and co-author Jacques Dumais review progress and challenges in plant biophysics. abstract »

Distribution of plant species in the Sundalan

July 1, 2011

The distribution of plant species in the Sundalan shows marked differences between the western (Malay Peninsula and Sumatra) and eastern (Borneo) areas. Cam Webb and associates analyzed 111 tree inventories and found evidence that exposed sea-beds formed a barrier to species dispersal between the two regions. The work is published in Proceedings of the National Academy of Sciences. abstract »

Deland Award recipients announced

June 25, 2011

To support their research in the living collection, students Juan Losada (Aula Dei Experimental Station–CSIC, Spain), Mariana Oliveira e Castro (University of Coimbra, Portugal), and Preeti Rao (Boston University) were granted Deland Awards for Student Research.

Clues on how flowering plants spread

June 20, 2011

In an article published in Proceedings of the National Academy of Sciences, Julien Bachelier and William (Ned) Friedman show that in Trimenia moorei, an ancient linage of woody vines, the females, not the males, compete for reproduction. The article was recommended by the Faculty of 1000. Harvard Gazette» abstract»

Policy framework proposed

June 15, 2011

Borneo is a biodiversity hotspot with the highest rate of forest clearance and degradation in the world. With opportunities to prevent extinctions dwindling, Cam Webb and colleagues proposed a policy framework for forest restoration, published in Conservation Letters. abstract »

NSF grant for Aquilegia research

June 14, 2011

Elena Kramer, currently on sabbatical at Weld Hill, received a NSF grant to use the new model system Aquilegia (columbine) to investigate the evolution and function of floral novelties. As outreach for the grant, Elena will utilize the plant’s recently sequenced genome to lead a module for the Crimson Summer Academy, a Harvard summer program for high school students from financially disadvantaged backgrounds. Congratulations Elena!

History of plant evolution

June 13, 2011

William (Ned) Friedman and co-author Pam Diggle from the University of Colorado penned a review in Plant Cell detailing the origin and history of the study of plant evolution and development (evo-devo). more » abstract »

Paper selected as “Must Read” in plant biology

June 10, 2011

An article by Maciej Zwieniecki and colleagues published in the Journal of the Royal Society Interface details a novel biomimicking technique to model phloem translocation. This paper was selected as a Faculty of 1000 “Must Read” paper in plant biology. abstract »

Working group on forest plots

June 5, 2011

The Arnold Arboretum hosted a CTFS and SIGEO working group meeting organized by Stuart Davies, Matteo Detto, and Helene Muller-Landau to discuss instrumentation for large-scale forest dynamic plots. more »

Conservation policies

June 1, 2011

In an article published in Nature, Peter Del Tredici and 18 fellow ecologists urge that conservation and management policies should be based on the ecological impacts of a species, not on its origins. abstract »

Magnolia populations examined

May 24, 2011

A paper by Peter Del Tredici just came out in Castanea examining populations of Magnolia virginiana in North America and Cuba.

Putnam Fellow announced

May 15, 2011

Cary Pirone was awarded a Putnam Fellowship at the Arnold Arboretum. She will use a combination of biochemical and anatomical approaches to study pollination drops in diverse gymnosperms. Congratulations Cary!

Species composition in Panama

May 13, 2011

Gracing the cover of Ecology is new work by Stuart Davies and colleagues detailing changes in species composition over 25 years in the Barro Colorado Island plot in Panama. more » pdf »

Travel grant received

April 27, 2011

Julien Bachelier was awarded a travel grant to attend the International Botanical Conference that will be held in Australia. Congratulations Julien!

Book on seasonally dry forests of Asia

April 22, 2011

Stuart Davies co-edited a book exploring the seasonally dry forests of Asia.

Interview with William (Ned) Friedman

March 27, 2011

In an interview in Silva, William (Ned) Friedman discusses his career as a plant biologist and future goals for the research program at the Arboretum.

Cam Webb discusses research

March 27, 2011

Cam Webb, a Senior Scientist based overseas, discusses his current research in Indonesia in the current edition of Silva.

Deland Award for research in conifers

March 20, 2011

Emily Scherbatskoy received a Deland Award for Student Research at the Arnold Arboretum to study female gametophyte morphology in the conifer collection.

Research on tomato fruit development

March 15, 2011

Faye Rosin and colleagues published their research on a regulatory gene involved in tomato fruit development and ripening in Plant Cell. abstract »

William (Ned) Friedman honored

February 19, 2011

William (Ned) Friedman was inducted as a Fellow of the American Association for the Advancement of Science(AAAS). Congratulations Ned! more »