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Arnold Arboretum

Collection Statistics

At the end of June 2014, the living collections comprised 14,915 individual plants (including nursery holdings) belonging to 10,229 accessions representing 3,873 taxa. Taken together, the collections are considered to be one of the largest (Table 1) and best documented (Table 2) woody plant collections in North America and the world. Many of these accessions or accession lineages are of historical and botanical importance, representing the original North American introductions of Eastern Asian plants collected by Arboretum staff and affiliates such as Charles Sprague Sargent, Ernest H. Wilson [pdf], John G. Jack [pdf], Joseph Rock [pdf], and William Purdom [pdf].

Search our living, legacy (dead), and herbaria collection inventories for plants of interest.

Table 1. Taxonomic profile of the Living Collections of the Arnold Arboretum.a
RANK NUMBER
Families 100
Genera 345
Species 2,115
Subspecies 79
Varieties 367
Formae 70
Cultivars 1,485
Infraspecific Hybrids 440
Intergeneric Hybrids 14

aNumbers for infraspecific ranks correspond only to those accessions where rank is known.

Table 2. Provenance of Accessions in the Living Collections of the Arnold Arboretum.
PROVENANCE TOTAL NUMBER PERCENT OF TOTAL
Wild
Direct 2,760 27
Indirecta 796 8
Garden 3,132 31
Uncertainb 3,541 34

aFrom a cultivated plant of known (indirect) wild origin.
bIncludes 2,155 existing or spontaneous accessions whose provenance cannot be determined.

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