Collection Statistics

Collection Statistics

As of June 2015, the living collections comprised 14,760 individual plants (including nursery holdings) belonging to 10,188 accessions representing 3,800 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 101
Genera 349
Species 2,092
Subspecies 80
Varieties 360
Formae 70
Cultivars 1,440
Infraspecific Hybrids 440
Intergeneric Hybrids 12

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 2,731 27
Indirecta 795 8
Garden 3,028 30
Uncertainb 3,634 35

aFrom a cultivated plant of known (indirect) wild origin.
bIncludes 2,295 existing or spontaneous accessions whose provenance cannot be determined.