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| scientific name | common name(s) | image gallery |
| Acacia farnesiana | Huisache Sweet acacia Mealy wattle | |
| Acer grandidentatum | Bigtooth maple Big-toothed maple Canyon maple | |
| Acacia rigidula | Blackbrush acacia Blackbrush Catclaw Chaparro prieto Gavia | |
| Acacia roemeriana | Roundflower catclaw Round-flower catclaw Roemer acacia Catclaw Roemer’s acacia Catclaw acacia | |
| 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 | Scarlet Buckeye Red buckeye Firecracker plant | |
| Aesculus pavia var. flavescens | Texas yellow buckeye Yellow woolly buckeye Pale buckeye Plateau yellow buckeye | |
| Aesculus pavia var. pavia | Scarlet buckeye Red buckeye Southern buckeye Firecracker plant | |
| Agave americana | American century plant Century plant | |
| Agave havardiana | Havard's century plant Havard agave | |
| Ageratina havanensis | Havana snakeroot Mistflower Shrubby boneset White mistflower White shrub mistflower | |
| Agave lechuguilla | Lechuguilla | |
| Allium canadense var. canadense | Canada onion Meadow garlic Wild onion | |
| Allium drummondii | Drummond's onion Wild Garlic Drummond wild onion | |
| Ampelopsis arborea | Peppervine | |
| Amorpha fruticosa | Indigo bush False indigo bush False indigo Desert false indigo | |
| 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 | |
| Aquilegia chrysantha var. hinckleyana | Hinckley's golden columbine Yellow columbine Hinckley columbine Capote columbine | |
| Aquilegia longissima | Longspur columbine Longspur yellow columbine | |
| Aristolochia coryi | Cory's dutchman's pipe | |
| Aristolochia erecta | Swanflower | |
| Aristolochia reticulata | Texas dutchman's pipe | |
| Aristolochia tomentosa | Woolly dutchman's pipe Common dutchmanspipe | |
| Arbutus xalapensis | Texas madrone Madrone Naked indian Manzanita | |
| Asclepias asperula | Spider milkweed Antelope horns Green-flowered milkweed Spider antelope-horns | |
| Asclepias oenotheroides | Zizotes milkweed Hierba de Zizotes Longhorn milkweed Side-cluster milkweed Primrose milkweed Lindheimer's milkweed | |
| Astrolepis sinuata | Wavy scaly cloakfern | |
| Asclepias texana | Texas milkweed White milkweed | |
| Asclepias tuberosa | Butterflyweed Butterfly milkweed Orange milkweed Pleurisy root | |
| Asclepias viridiflora | Green milkweed Green comet milkweed Green antelopehorn milkweed | |
| Asclepias viridis | Green antelopehorn Green milkweed | |
| Bauhinia lunarioides | Anacacho orchid tree Anacacho bauhinia Orchid tree Texas plume | |
| Bignonia capreolata | Crossvine | |
| Bouteloua curtipendula | Sideoats grama | |
| Bouteloua dactyloides | Buffalograss Buffalo grass | |
| Bouteloua gracilis | Blue grama | |
| Bouvardia ternifolia | Scarlet bouvardia Firecracker bush Trompetilla Clavillo | |
| 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 | Berlandier's sundrops Square-bud primrose Sundrops | |
| Carex blanda | Eastern woodland sedge Creek sedge Common wood sedge | |
| Canna glauca | Water Canna Louisiana Canna Maraca amarilla | |
| Carya illinoinensis | Pecan | |
| Callirhoe involucrata | Winecup Purple poppy mallow | |
| Carex perdentata | Meadow Sedge Sand sedge | |
| Carex planostachys | Cedar sedge | |
| Carex retroflexa | Reflexed sedge | |
| scientific name | common name(s) | image gallery |