| scientific name | common name(s) | image gallery |
| Ageratina havanensis | Havana snakeroot Mistflower Shrubby boneset White mistflower White shrub mistflower | |
| Amorpha fruticosa | Indigo bush False indigo bush False indigo Desert false indigo | |
| Amblyolepis setigera | Huisache daisy Butterfly daisy Honey daisy | |
| Andropogon gerardii | Big bluestem Turkeyfoot | |
| Andropogon glomeratus | Bushy bluestem Brushy bluestem | |
| Anisacanthus quadrifidus var. wrightii | Flame acanthus Hummingbird bush Wright's desert honeysuckle Wright acanthus | |
| Aquilegia canadensis | Eastern red columbine Wild red columbine | |
| Asclepias asperula | Spider milkweed Antelope horns Green-flowered milkweed Spider antelope-horns | |
| Asclepias tuberosa | Butterflyweed Butterfly milkweed Orange milkweed | |
| Asclepias viridiflora | Green milkweed Green comet milkweed Green antelopehorn milkweed | |
| scientific name | common name(s) | image gallery |