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| scientific name | common name(s) | image gallery |
| Abies amabilis | Cascade fir Lovely fir Pacific silver fir White fir | |
| Abies balsamea | Balsam fir Balsam | |
| Abies bracteata | Bristlecone fir | |
| Abies concolor | Balsam fir Colorado fir Concolor fir Oyamel de California Silver fir White balsam White fir | |
| Abies fraseri | Fraser fir She-balsam | |
| Abies grandis | Giant fir Grand fir | |
| Abies lasiocarpa | Subalpine fir | |
| Abies magnifica | California red fir Red fir | |
| Abies procera | Noble fir | |
| Abronia ameliae | Amelia's sand verbena Heart’s delight Amelia's sand-verbena Sand verbena | |
| Abronia angustifolia | Purple sand verbena Narrow-leaf sand-verbena | |
| Abronia elliptica | Fragrant white sand verbena Snowball Sand Verbena | |
| Abronia fragrans | Fragrant verbena Sand verbena Snowball Snowball sand verbena Sweet sand-verbena | |
| Abronia latifolia | Coastal sand verbena Yellow Sand Verbena | |
| Abronia maritima | Red sand verbena | |
| Abronia mellifera | White sand verbena | |
| Abronia pogonantha | Mojave sand verbena | |
| Abronia umbellata | Beach Sand Verbena Pink sand verbena | |
| Abronia villosa | Desert sand verbena Desert sand-verbena Desert sandverbena | |
| Abronia villosa var. villosa | Desert sand verbena Sand verbena | |
| Abutilon abutiloides | Shrubby Indian mallow | |
| Abutilon fruticosum | Indian mallow Texas Indian mallow | |
| Abutilon hypoleucum | Rio Grande abutilon White-leaf indian-mallow Whiteleaf Indian mallow | |
| Abutilon incanum | Indian mallow Pelotazo Shrubby Indian mallow | |
| Abutilon malacum | Yellow Indian Mallow | |
| Abutilon parvulum | Dwarf Indian mallow | |
| Abutilon trisulcatum | Anglestem Indian Mallow | |
| Abutilon wrightii | Wright's Indian mallow | |
| Acacia angustissima | Prairie acacia Fern acacia Prairie wattle Whiteball acacia | |
| Acacia angustissima var. chisosiana | Chisos Prairie Acacia | |
| Acacia angustissima var. hirta | Prairie acacia | |
| Acacia angustissima var. texensis | Prairie wattle | |
| Acacia berlandieri | Guajillo Berlandier acacia Thornless Catclaw Mimosa Catclaw Round-flowered Catclaw Huajillla Matoral | |
| Acacia constricta | Whitethorn acacia White-thorn acacia Mescat acacia Mescat wattle Whitethorn Vara Prieta Chaparro Prieto | |
| Acacia farnesiana | Huisache Sweet acacia Mealy wattle | |
| Acacia greggii | Catclaw acacia Gregg acacia Long-flower catclaw Una de gato | |
| Acacia greggii var. wrightii | Catclaw acacia Catclaw Wright acacia | |
| Acacia neovernicosa | Viscid acacia | |
| Acacia rigidula | Blackbrush acacia Blackbrush Catclaw Chaparro prieto Gavia | |
| Acacia roemeriana | Roundflower catclaw Round-flower catclaw Roemer acacia Catclaw Roemer’s acacia Catclaw acacia | |
| Acacia schaffneri | Schaffner's wattle Twisted acacia | |
| Acacia schaffneri var. bravoensis | Huisachillo Schaffner's wattle Twisted acacia | |
| Acacia schottii | Schott's Wattle Schott's Acacia | |
| Acacia tortuosa | Huisachillo Poponax | |
| Acalypha californica | California copperleaf | |
| Acalypha gracilens | Slender threeseed mercury | |
| Acalypha monococca | Slender threeseed mercury | |
| Acalypha monostachya | Round copperleaf | |
| Acalypha ostryifolia | Pineland threeseed mercury Hop-hornbeam copperleaf | |
| Acalypha phleoides | Shrubby copperleaf Three-seeded mercury | |
| scientific name | common name(s) | image gallery |