Collection Statistics

Collection Statistics

As of February 2015, the living collections comprised 14,836 individual plants (including nursery holdings) belonging to 10,251 accessions representing 3,818 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 99
Genera 344
Species 2,086
Subspecies 80
Varieties 361
Formae 70
Cultivars 1,461
Infraspecific Hybrids 437
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 2,719 27
Indirecta 790 8
Garden 3,062 30
Uncertainb 3,644 35

aFrom a cultivated plant of known (indirect) wild origin.
bIncludes 2,293 existing or spontaneous accessions whose provenance cannot be determined.