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Research Spotlight: Mycorrhizae and the Arboretum Truffle

In 2016, the Donald Pfister lab at Harvard University discovered a new species of mycorrhizal truffle at the Arboretum, related to the famed culinary truffle but genetically distinct. Nine years later the lab is still making new discoveries in the field of mycorrhizae: the fungi that form symbiotic associations with plant roots and provide the plants with extra water and nutrients from the soil in exchange for a steady supply of sugars.

Join Professor Don Pfister for a research spotlight on mycorrhizae and the Arboretum truffle, and learn about the biology of mycorrizae, how the Arboretum truffle and other mycorrhizae disperse their spores, and how to go about finding mycorrhizae in the landscape. The group will also take some soil cores and look for evidence of mycorrhizae in the soil. Maybe we’ll find a truffle!

Accessibility: This program involves climbing moderate slopes and walking over mulch paths, gravel paths, and mowed grass.

Audience: This program is geared towards adults.

Inclement weather policy: Participants will be notified via email at least one day in advance if a program needs to be cancelled due to inclement weather, and will be notified by phone if a program must be cancelled with less one day’s notice. Click here to view our full inclement weather policy. If you have questions about the status of a program, please email publicprograms@arnarb.harvard.edu (inbox monitored on weekdays) or call the Visitor Center desk between 10:00am and 4:00pm at (617) 384-5209.

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Date

Aug 23 2025

Time

4:00 pm - 6:00 pm

More Info

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Formats

Walk

Location

in front of the Hunnewell Building
125 Arborway, Jamaica Plain, MA
Subject Matter
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in front of the Hunnewell Building

Directions

Learn about accessibility at the Arboretum.

in front of the Hunnewell Building

By subway

Take the MBTA Orange Line to its southern end—Forest Hills. Exit through the door marked “Arnold Arboretum,” cross Washington Street, and walk up Arborway to the Arboretum’s Forest Hills Gate on your left. To reach the Arboretum’s Arborway Gate and the Hunnewell Building, continue along the sidewalk on the Arborway to the Arborway Gate (about 12 minutes), or go through the gate, bear right at the pond, and continue to the Hunnewell Building, which will be on your left.

By bus

Take the #39 bus to the South Street @ Bardwell Street stop in Jamaica Plain. Walk down South Street away from Bardwell Street, take a right on Custer Street, and walk down Custer Street until it ends. Turn right and walk about 300 feet down Arborway to the Arboretum’s Arborway Gate, which will be across the street. The Hunnewell Building is just inside the gate on your right.

By car

There is public street parking on Arborway, including six designated accessible spots on either side of the gate. Parking on Arborway can sometimes fill up and you may need to walk a little ways from your parking spot to the gate. Please allow for extra time to account for this, especially during the spring and for large programs like lectures and performances.