This list is intended to include all significant botanical gardens and arboretums in the United States. [3] [4] [5]
The total number of botanical gardens recorded in the United States depends on the criteria used, and is in the range from 296 [6] to 1014. [3]
The approximate number of living plant accessions recorded in these botanical gardens — 600,000. [6]
The approximate number of taxa in these collections — 90,000 taxa or approximately 40,000 species. [6]
Estimated percentage of collections in existence before Convention on Biological Diversity — 70%. [6]