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| scientific name | common name(s) | image gallery |
| Abutilon incanum | Indian mallow Pelotazo Shrubby Indian mallow | |
| Acer grandidentatum | Bigtooth maple Big-toothed maple Canyon maple | |
| 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 | |
| Acalypha radians | Cardinal's feather Cardinal feather | |
| Aesculus pavia | Scarlet Buckeye Red buckeye Firecracker plant | |
| Agalinis edwardsiana | Plateau false foxglove Plateau agalinis Plateau gerardia Plateau false-foxglove | |
| Ageratina havanensis | Havana snakeroot Mistflower Shrubby boneset White mistflower White shrub mistflower | |
| Agalinis heterophylla | Prairie false foxglove Prairie agalinis Prairie false-foxglove | |
| Agave univittata | Maguey mezortillo Thorncrest century plant | |
| Allium canadense | Meadow garlic Wild garlic Wild onion | |
| 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 | |
| Aloysia macrostachya | Rio Grande beebrush Woolly Bee-brush | |
| Ambrosia artemisiifolia | Annual ragweed Short ragweed | |
| Ampelopsis arborea | Peppervine | |
| Amorpha fruticosa | Indigo bush False indigo bush False indigo Desert false indigo | |
| Amyris madrensis | Mountain torchwood Shrub Amyris | |
| Amorpha roemeriana | Roemer's false indigo | |
| Anemone berlandieri | Tenpetal thimbleweed Ten-petaled anemone Wind-flower | |
| Anemone edwardsiana | Edwards Plateau thimbleweed Two-flowered Anemone | |
| 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 Mexican flame Wright's Mexican flame | |
| Aphanostephus riddellii | Lazy Daisy Riddell's dozedaisy | |
| Aquilegia canadensis | Eastern red columbine Wild red columbine | |
| Argemone albiflora | Bluestem pricklypoppy White pricklypoppy | |
| Arenaria benthamii | Hilly sandwort | |
| Argyrochosma dealbata | False Cloak Fern Powdery Cloak Fern Powdery false cloak fern | |
| Arisaema dracontium | Green dragon Dragonroot Greendragon | |
| Aristida oligantha | Prairie threeawn Oldfield (Prairie) 3-awn Oldfield threeawn | |
| Arabis petiolaris | Brazos rockcress Rock-cress Brazos rock-cress | |
| Arnoglossum plantagineum | Groovestem Indian plaintain Indian plantain Prairie plantain Prairie Indian plantain | |
| Aristida purpurea | Purple threeawn Purple 3-awn Purple three-awn Red threeawn | |
| Arbutus xalapensis | Texas madrone Madrone Naked indian Manzanita | |
| Asclepias asperula | Spider milkweed Antelope horns Green-flowered milkweed Spider antelope-horns | |
| Asclepias incarnata | Swamp milkweed Pink Milkweed | |
| Asclepias oenotheroides | Zizotes milkweed Hierba de Zizotes Longhorn milkweed Side-cluster milkweed Primrose milkweed Lindheimer's milkweed | |
| Asclepias tuberosa | Butterflyweed Butterfly milkweed Orange milkweed Pleurisy root | |
| Asclepias viridis | Green antelopehorn Green milkweed | |
| Bauhinia lunarioides | Anacacho orchid tree Anacacho bauhinia Orchid tree Texas plume | |
| Bacopa monnieri | Coastal Water-hyssop Herb-of-grace Water hyssop | |
| Baccharis neglecta | False Willow Jara dulce Poverty Weed Roosevelt Weed | |
| Berlandiera betonicifolia | Texas greeneyes Broochflower | |
| Berlandiera lyrata | Chocolate daisy Chocolate flower Lyreleaf greeneyes Green-Eyed lyre leaf | |
| Bignonia capreolata | Crossvine | |
| Bidens laevis | Smooth beggartick Smooth bidens Smooth bur marigold Larger bur marigold | |
| Bouteloua curtipendula | Sideoats grama | |
| Bouteloua dactyloides | Buffalograss Buffalo grass | |
| Bouchetia erecta | Painted Tongue Paintedtongue | |
| Bouteloua gracilis | Blue grama | |
| Bouteloua hirsuta | Hairy grama | |
| Bothriochloa laguroides ssp. torreyana | Silver Beard Grass Silver beardgrass Silver Bluestem | |
| Bouteloua rigidiseta | Texas grama | |
| Bouteloua trifida | Red grama | |
| Buddleja marrubiifolia | Woolly butterflybush Butterfly bush Woolly Butterfly-bush | |
| Callicarpa americana | American beautyberry French mulberry | |
| Capsicum annuum | Chile pequin Chile petin Bird pepper Turkey pepper Cayenne pepper | |
| Calylophus berlandieri ssp. pinifolius | Berlandier's sundrops Square-bud primrose Sundrops Square-bud day-primrose | |
| Carex blanda | Eastern woodland sedge Creek sedge Common wood sedge | |
| Carex cherokeensis | Cherokee sedge | |
| Calliandra eriophylla | Pink fairyduster Fairyduster Mesquitilla Mock mesquite | |
| Canna glauca | Water Canna Louisiana Canna Maraca amarilla | |
| Calylophus hartwegii | Hartweg's sundrops Western Primrose | |
| Callirhoe involucrata | Winecup Purple poppy mallow | |
| Callirhoe involucrata var. lineariloba | Poppy mallow Purple poppymallow White poppy mallow White winecup Winecup | |
| Callirhoe leiocarpa | Tall poppymallow Annual winecup Tall poppy-mallow | |
| Callirhoe pedata | Finger Poppy-mallow Palmleaf poppymallow Standing Winecup | |
| 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 | |
| Carex texensis | Texas sedge | |
| Centaurea americana | American star-thistle Basket-Flower Star thistle Shaving brush American basket-flower | |
| Centaurium beyrichii | Mountain pink Meadow pink Catchfly Quinineweed | |
| Cercis canadensis var. mexicana | Mexican redbud | |
| Ceanothus herbaceus | Redroot Prairie redroot Jersey tea Inland Ceanothus Fuzzy Ceanothus | |
| 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 | |
| Cephalanthus occidentalis | Common buttonbush Buttonbush Button willow | |
| Centaurium texense | Lady Bird's centaury | |
| Chamaesaracha coniodes | False Nightshade Gray five eyes Ground Saracha Prostrate Ground-cherry | |
| Chamaecrista fasciculata var. fasciculata | Partridge pea Showy Partridge-pea Beeflower | |
| 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 | |
| Chaptalia nutans | Heal and draw Lechuguilla Silverpuff | |
| Chaerophyllum tainturieri var. tainturieri | Hairyfruit chervil Hairy-fruit chervil Wild chervil Chervil | |
| Chloris verticillata | Tumble windmill grass Windmillgrass | |
| Citharexylum berlandieri | Berlandier's fiddlewood Berlandier fiddlewood Fiddlewood | |
| Cissus trifoliata | Cow-itch vine Sorrelvine Grape ivy Arizona grape ivy Possum grape | |
| 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 pitcheri | Purple clematis Purple leatherflower Leatherflower Bluebill | |
| Clematis texensis | Scarlet clematis Scarlet leatherflower Texas clematis | |
| Cocculus carolinus | Carolina snailseed Carolina coralbead Carolina moonseed Red berried moonseed Carolina red berried moonseed | |
| Conoclinium coelestinum | Blue mistflower | |
| 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 | |
| Convolvulus equitans | Bindweed Texas bindweed | |
| scientific name | common name(s) | image gallery |