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Arnold Arboretum

Collection Statistics

As of August 2014, the living collections comprised 14,981 individual plants (including nursery holdings) belonging to 10,301 accessions representing 3,865 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 2,109
Subspecies 79
Varieties 365
Formae 70
Cultivars 1,484
Infraspecific Hybrids 442
Intergeneric Hybrids 13

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 2,756 27
Indirecta 793 8
Garden 3,116 30
Uncertainb 3,636 35

aFrom a cultivated plant of known (indirect) wild origin.
bIncludes 2,261 existing or spontaneous accessions whose provenance cannot be determined.

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