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| scientific name | common name(s) | image gallery |
| Acer grandidentatum | Bigtooth maple Big-toothed maple Canyon maple | |
| Acleisanthes longiflora | Angel trumpets Angel's trumpets | |
| Alternanthera caracasana | Washerwoman | |
| Allium drummondii | Drummond's onion Wild Garlic Drummond wild onion | |
| Aloysia gratissima | Whitebrush Bee-brush White-brush Common bee-brush Beebrush Privet lippia | |
| Allionia incarnata | Trailing windmills Trailing four o'clock Pink windmills Trailing allionia | |
| Amaranthus palmeri | Carelessweed | |
| Ammoselinum popei | Plains sandparsley | |
| Ambrosia psilostachya | Cuman ragweed Western ragweed Perennial ragweed Common ragweed | |
| Amaranthus retroflexus | Redroot amaranth | |
| Anisacanthus quadrifidus var. wrightii | Flame acanthus Hummingbird bush Wright's desert honeysuckle Wright acanthus Mexican flame Wright's Mexican flame | |
| Argemone albiflora | Bluestem pricklypoppy White pricklypoppy | |
| Artemisia filifolia | Sand sagebrush Silver sagebrush Silvery wormwood Sand sage | |
| Artemisia ludoviciana | Louisiana artemisia Louisiana sage White sage Prairie sage Silver sage White sagebrush Louisiana wormwood Silver wormwood Louisiana sagewort Gray sagewort Cudweed sagewort Mugwort wormwood | |
| Asclepias oenotheroides | Zizotes milkweed Hierba de Zizotes Longhorn milkweed Side-cluster milkweed Primrose milkweed Lindheimer's milkweed | |
| Asclepias subverticillata | Horsetail milkweed Poison Milkweed | |
| Atriplex canescens | Chamiso Four-wing saltbush Fourwing saltbush Wingscale | |
| Baccharis texana | Prairie false willow | |
| Berlandiera lyrata | Chocolate daisy Chocolate flower Lyreleaf greeneyes Green-Eyed lyre leaf | |
| Bouteloua barbata | Sixweeks grama | |
| Bouteloua curtipendula | Sideoats grama | |
| Bouteloua dactyloides | Buffalograss Buffalo grass | |
| Bouteloua eriopoda | Black grama | |
| Bouteloua gracilis | Blue grama | |
| Bouvardia ternifolia | Scarlet bouvardia Firecracker bush Trompetilla Clavillo | |
| Callicarpa americana | American beautyberry French mulberry | |
| Callirhoe involucrata | Winecup Purple poppy mallow | |
| Campsis radicans | Trumpet creeper Trumpet vine Common trumpet creeper Cow vine | |
| Carlowrightia texana | Texas wrightwort | |
| Centaurea americana | American star-thistle Basket-Flower Star thistle Shaving brush American basket-flower | |
| Cercis canadensis var. texensis | Texas redbud | |
| Celtis laevigata | Sugar hackberry Hackberry Sugarberry Texas sugarberry Palo blanco | |
| Celtis laevigata var. reticulata | Netleaf hackberry Netleaf sugar hackberry Sugar Hackberry Texas Sugarberry Palo Blanco Acibuche | |
| Cercocarpus ledifolius | Curl-leaf mountain mahogany Curl-leaf mountain-mahogany | |
| Cephalanthus occidentalis | Common buttonbush Buttonbush Button willow | |
| Chenopodium berlandieri | Pitseed goosefoot Lambs quarters | |
| Chamaesaracha coronopus | Green false nightshade Greenleaf five eyes | |
| Chloris cucullata | Hooded windmill grass Hooded windmillgrass | |
| Chenopodium incanum | Mealy goosefoot | |
| Chilopsis linearis | Desert willow Flowering willow Willow-leaved catalpa Trumpet flower | |
| Chrysactinia mexicana | Damianita | |
| Chamaesaracha sordida | False Nightshade Hairy five eyes | |
| Chaerophyllum tainturieri | Hairyfruit chervil Southern chervil | |
| Chloris verticillata | Tumble windmill grass Windmillgrass | |
| Cirsium texanum | Texas thistle | |
| Corydalis aurea | Scrambled eggs Golden corydalis | |
| Conyza canadensis | Canadian horseweed Horseweed | |
| Convolvulus equitans | Bindweed Texas bindweed | |
| Commelina erecta | Whitemouth dayflower Widow's tears Day flower White-mouth dayflower | |
| Coreopsis lanceolata | Lanceleaf coreopsis Lanceleaf tickseed Lance-leaved coreopsis Sand coreopsis | |
| scientific name | common name(s) | image gallery |