The current holdings of the Garden include:

308 families
2,714 genera
9,632 species
12,847 taxa
19,300 accessions

Each accession represents one or more plants in the Garden.

The five best-represented families are:

Cactus family (2,419 accessions; 1,389 taxa),
Lily family (1,131 accessions; 686 taxa),
Sunflower family (1,016 accessions; 760 taxa),
Heath family (951 accessions; 589 taxa), and
Orchid family (999 accessions; 633 taxa).