As of May 2013, the living collections comprised 15,136 individual plants (including nursery holdings) belonging to 10,363 accessions representing 3,927 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].
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|Table 1. Taxonomic profile of the Living Collections of the Arnold Arboretum.a|
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|
aFrom a cultivated plant of known (indirect) wild origin.
bIncludes 2,205 existing or spontaneous accessions whose provenance cannot be determined.