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| scientific name | common name(s) | image gallery |
| 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 fragrans | Fragrant verbena Sand verbena Snowball Snowball sand verbena Sweet sand-verbena | |
| Abutilon fruticosum | Indian mallow Texas Indian mallow | |
| Acacia angustissima | Prairie acacia Fern acacia Prairie wattle Whiteball acacia | |
| Acacia berlandieri | Guajillo Berlandier acacia Thornless Catclaw Mimosa Catclaw Round-flowered Catclaw Huajillla Matoral | |
| 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 | |
| Achnatherum hymenoides | Indian ricegrass Indian Millet Sandgrass | |
| Achillea millefolium | Common yarrow Yarrow Milfoil Western yarrow | |
| Acer negundo | Ash-leaf maple Ash-leaved maple Box elder Boxelder Fresno de guajuco | |
| 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 var. bravoensis | Huisachillo Schaffner's wattle Twisted acacia | |
| Acourtia wrightii | Brownfoot Pink perezia | |
| Adiantum capillus-veneris | Southern maidenhair fern Common maidenhair fern Maidenhair fern Venus hair fern | |
| Aesculus glabra var. arguta | Ohio buckeye White buckeye Texas buckeye | |
| Aesculus pavia var. flavescens | Texas yellow buckeye Yellow woolly buckeye Pale buckeye Plateau yellow buckeye | |
| Allium canadense var. canadense | Canada onion Meadow garlic Wild onion | |
| Allium canadense var. mobilense | Meadow garlic Wild onion | |
| Allium coryi | Yellow-flowered onion Yellowflower onion | |
| Allium drummondii | Drummond's onion Wild Garlic Drummond wild onion | |
| Aloysia gratissima | Whitebrush Bee-brush White-brush Common bee-brush Beebrush Privet lippia | |
| Aloysia wrightii | Wright's beebrush Wright’s lippia | |
| Ampelopsis arborea | Peppervine | |
| Amsonia ciliata | Fringed bluestar Bluestar Blue funnel lily Texas bluestar | |
| Ampelopsis cordata | Heartleaf peppervine Heart-leaf ampelopsis | |
| Amorpha fruticosa | Indigo bush False indigo bush False indigo Desert false indigo | |
| Amsonia illustris | Ozark bluestar Showy blue-star Missouri blue star Swamp bluestar | |
| Amblyolepis setigera | Huisache daisy Butterfly daisy Honey daisy | |
| Androstephium caeruleum | Androstephium Blue funnel lily Blue Funnel-lily Fragrant lily Funnel-Flower | |
| Andropogon gerardii | Big bluestem Turkeyfoot | |
| Andropogon glomeratus | Bushy bluestem Brushy bluestem | |
| Andropogon virginicus | Broomsedge bluestem Broom-sedge | |
| Aphanostephus skirrhobasis | Lazy daisy Arkansas lazy daisy Arkansas dozedaisy | |
| Argemone mexicana | Mexican pricklypoppy Mexican prickly poppy Yellow pricklypoppy | |
| Asclepias texana | Texas milkweed White milkweed | |
| Atriplex canescens | Chamiso Four-wing saltbush Fourwing saltbush Wingscale | |
| Baccharis neglecta | False Willow Jara dulce Poverty Weed Roosevelt Weed | |
| Bothriochloa barbinodis | Cane bluestem | |
| Bouteloua curtipendula | Sideoats grama | |
| Bouteloua dactyloides | Buffalograss Buffalo grass | |
| Bouteloua eriopoda | Black grama | |
| Bouteloua gracilis | Blue grama | |
| Bouteloua hirsuta | Hairy grama | |
| Bouteloua hirsuta var. pectinata | Hairy grama Tall grama | |
| Bouchea linifolia | Flaxleaf bouchea Groovestem bouchea | |
| Bouteloua rigidiseta | Texas grama | |
| Capsicum annuum var. glabriusculum | Chile pequin Bird pepper Turkey pepper Cayenne pepper | |
| Calylophus berlandieri ssp. pinifolius | Berlandier's sundrops Square-bud primrose Sundrops Square-bud day-primrose | |
| Calliandra conferta | Rio Grande stickpea Fairy duster | |
| Callirhoe digitata | Finger poppy-mallow Poppy mallow Standing winecup Wine cup Winecup | |
| Castela erecta ssp. texana | Allthorn goatbush Amargoso Goat-bush Texan goatbush | |
| Calylophus hartwegii | Hartweg's sundrops Western Primrose | |
| Carya illinoinensis | Pecan | |
| Castilleja indivisa | Entireleaf indian paintbrush Texas paintbrush Indian paintbrush Scarlet paintbrush Entire-leaf indian-paintbrush | |
| Callirhoe involucrata | Winecup Purple poppy mallow | |
| Carex planostachys | Cedar sedge | |
| Castilleja purpurea | Prairie paintbrush Downy Indian paintbrush Purple paintbrush Lemon paintbrush Purple painted cup | |
| Campsis radicans | Trumpet creeper Trumpet vine Common trumpet creeper Cow vine | |
| Camassia scilloides | Atlantic camas Wild hyacinth | |
| Ceanothus americanus | New Jersey tea Redroot | |
| Centaurea americana | American star-thistle Basket-Flower Star thistle Shaving brush American basket-flower | |
| Centaurium beyrichii | Mountain pink Meadow pink Catchfly Quinineweed | |
| Celtis ehrenbergiana | Desert hackberry Spiny hackberry Granjeno Shiny hackberry Huasteco | |
| 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 montanus var. argenteus | Silver mountain mahogany Mountain mahogany True mountain mahogany Silverleaf mountain mahogany | |
| Cephalanthus occidentalis | Common buttonbush Buttonbush Button willow | |
| Chloris cucullata | Hooded windmill grass Hooded windmillgrass | |
| Chasmanthium latifolium | Inland sea oats Indian wood oats Wild oats River oats Flathead oats Upland Oats Upland Sea Oats | |
| Chilopsis linearis | Desert willow Flowering willow Willow-leaved catalpa Trumpet flower | |
| Chrysactinia mexicana | Damianita | |
| Chloris virgata | Feather fingergrass Showy chloris | |
| Citharexylum berlandieri | Berlandier's fiddlewood Berlandier fiddlewood Fiddlewood | |
| Cirsium texanum | Texas thistle | |
| Clematis drummondii | Drummond's clematis Old man’s beard Texas virgin’s bower Goat’s beard | |
| Cladium mariscus ssp. jamaicense | Jamaica swamp sawgrass Jamaican Saw-grass Saw-grass | |
| Clematis texensis | Scarlet clematis Scarlet leatherflower Texas clematis | |
| Corydalis aurea | Scrambled eggs Golden corydalis | |
| Coreopsis basalis | Coreopsis Golden-wave Goldenmane tickseed | |
| Cocculus carolinus | Carolina snailseed Carolina coralbead Carolina moonseed Red berried moonseed Carolina red berried moonseed | |
| Corydalis curvisiliqua | Curvepod Curvepod fumewort Golden Smoke Scrambled Eggs | |
| Cornus drummondii | Roughleaf dogwood Drummond's dogwood Rough-leaf dogwood | |
| Cooperia drummondii | Evening rain lily Evening star rain lily | |
| Condalia hookeri | Bluewood condalia Brasil Brazilwood Brazilian bluewood | |
| Coreopsis lanceolata | Lanceleaf coreopsis Lanceleaf tickseed Lance-leaved coreopsis Sand coreopsis | |
| Cotinus obovatus | American smoke tree Smoke tree Texas smoke tree Chittamwood | |
| Cooperia pedunculata | Hill Country rain lily Prairie lily Rain lily | |
| Colubrina texensis | Hog-plum Texan hogplum Texas colubrina Texas snakewood | |
| Coreopsis tinctoria | Plains coreopsis Golden tickseed Goldenwave Calliopsis | |
| Croton alabamensis var. texensis | Texabama croton Texas Alabama croton | |
| Crataegus crus-galli | Cockspur hawthorn Cockspur thorn Newcastle hawthorn Newcastle thorn | |
| Crataegus reverchonii | Reverchon hawthorn Reverchon's hawthorn | |
| Crataegus viridis | Green hawthorn Southern thorn | |
| Dalea frutescens | Black dalea Black prairie clover | |
| Dasyochloa pulchella | Fluff grass Low woollygrass | |
| Dasylirion texanum | Texas sotol Sotol | |
| Datura wrightii | Sacred thorn-apple Jimsonweed Thorn apple Datura Angel Trumpet Sacred datura | |
| scientific name | common name(s) | image gallery |