| scientific name | common name(s) | image gallery |
| Abronia ameliae | Amelia's sand verbena Heart’s delight Amelia's sand-verbena Sand verbena | |
| Abronia ameliae | Amelia's sand verbena Heart’s delight Amelia's sand-verbena Sand verbena | |
| Acer grandidentatum | Bigtooth maple Big-toothed maple Canyon maple | |
| Acer grandidentatum | Bigtooth maple Big-toothed maple Canyon maple | |
| Acer negundo | Ash-leaf maple Ash-leaved maple Box elder Boxelder Fresno de guajuco | |
| Aesculus pavia var. pavia | Scarlet buckeye Red buckeye Southern buckeye Firecracker plant | |
| Aloysia gratissima | Whitebrush Bee-brush White-brush Common bee-brush Beebrush Privet lippia | |
| Allowissadula holosericea | Chisos Mountain false Indianmallow Chisos Mtn. False Indian-mallow Velvet-leaf Mallow | |
| Ammannia coccinea | Valley redstem Scarlet tooth-cup | |
| Amaranthus greggii | Gregg's amaranth | |
| scientific name | common name(s) | image gallery |