| Ancylobotrys petersiana | Mbohoya, Mwungo-wungo. | Apocynaceae | Ancylobotrys rotundifolia (Dew?vre) Pierre Landolphia angustifolia K.Schum. ex Engl. Landolphia mont | 4 | 0 |
| Apocynum androsaemifolium | Spreading Dogbane | Apocynaceae | | 0 | 2 |
| Apocynum cannabinum | Indian Hemp | Apocynaceae | Apocynum cannibinum (misspelt) | 2 | 2 |
| Apocynum pictum | Kendyr | Apocynaceae | Apocynum grandiflorum Danguy. Apocynum hendersonii Hook.f. Poacynum hendersonii (Hook.f.) Woodson. Poacynum pictum (Schrenk) Baill. | 0 | 2 |
| Apocynum venetum | | Apocynaceae | A. sibiricum. Trachomitum venetum. (L.)Woodson. | 0 | 2 |
| Araujia sericifera | Cruel Plant, White bladderflower | Apocynaceae | | 1 | 0 |
| Asclepias asperula | Spider milkweed | Apocynaceae | | 4 | 1 |
| Asclepias brachystephana | Bract milkweed | Apocynaceae | | 0 | 0 |
| Asclepias californica | California Milkweed, Greene's milkweed | Apocynaceae | | 2 | 1 |
| Asclepias currasavica | Blood Flower | Apocynaceae | Asclepias aurantiaca Salisb. Asclepias bicolor Moench Asclepias cubensis Wender. Asclepias margaritacea Hoffmanns. ex Schult. Asclepias nivea curassavica (L.) Kuntze. Asclepias curassavica (correct name) | 0 | 1 |
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