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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 | |
| Acacia berlandieri | Guajillo Berlandier acacia Thornless Catclaw Mimosa Catclaw Round-flowered Catclaw Huajillla Matoral | |
| Acacia farnesiana | Huisache Sweet acacia Mealy wattle | |
| Achillea millefolium | Common yarrow Yarrow Milfoil Western yarrow | |
| Acacia rigidula | Blackbrush acacia Blackbrush Catclaw Chaparro prieto Gavia | |
| Acourtia wrightii | Brownfoot Pink perezia | |
| Aesculus pavia | Scarlet Buckeye Red buckeye Firecracker plant | |
| Agave lechuguilla | Lechuguilla | |
| Agave parryi ssp. parryi | Century plant Mescal Parry's agave Rough agave | |
| Agalinis purpurea | Purple false foxglove Purple gerardia Gerardia | |
| Aletris aurea | Golden colicroot Colicroot Star grass Yellow colic root | |
| Allium canadense var. canadense | Canada onion Meadow garlic Wild onion | |
| Allium canadense var. mobilense | Meadow garlic Wild onion | |
| Alophia drummondii | Propeller flower Purple pleat-leaf Pinewoods lily Prairie iris Pleatleaf iris | |
| 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 | |
| Amsonia ciliata | Fringed bluestar Bluestar Blue funnel lily Texas bluestar | |
| Amblyolepis setigera | Huisache daisy Butterfly daisy Honey daisy | |
| Anemone berlandieri | Tenpetal thimbleweed Ten-petaled anemone Wind-flower | |
| Androstephium caeruleum | Androstephium Blue funnel lily Blue Funnel-lily Fragrant lily Funnel-Flower | |
| Aphanostephus skirrhobasis | Lazy daisy Arkansas lazy daisy Arkansas dozedaisy | |
| Argemone albiflora | Bluestem pricklypoppy White pricklypoppy | |
| Argemone chisosensis | Chisos Mountain pricklypoppy | |
| Arisaema dracontium | Green dragon Dragonroot Greendragon | |
| Argemone mexicana | Mexican pricklypoppy Mexican prickly poppy Yellow pricklypoppy | |
| Arisaema triphyllum ssp. quinatum | Five-leaved Jack-in-the-pulpit Jack in the pulpit Indian turnip | |
| Arbutus xalapensis | Texas madrone Madrone Naked indian Manzanita | |
| Asclepias asperula | Spider milkweed Antelope horns Green-flowered milkweed Spider antelope-horns | |
| Astragalus giganteus | Giant milkvetch | |
| Asclepias latifolia | Broadleaf milkweed | |
| Astragalus mollissimus | Purple locoweed Woolly loco Woolly locoweed Woolly milkvetch Wooly loco Wooly locoweed | |
| Asclepias tuberosa | Butterflyweed Butterfly milkweed Orange milkweed Pleurisy root | |
| Aureolaria grandiflora | False foxglove Largeflower yellow false foxglove | |
| Baptisia bracteata var. leucophaea | Longbract wild indigo Cream false indigo Plains wild indigo Cream wild indigo Large-bracted wild indigo | |
| Baileya multiradiata | Desert marigold Showy desert marigold Paper daisy Desert baileya | |
| Baptisia sphaerocarpa | Bush pea Green wild indigo Yellow wild indigo Yellow wisteria | |
| Berlandiera lyrata | Chocolate daisy Chocolate flower Lyreleaf greeneyes Green-Eyed lyre leaf | |
| Bignonia capreolata | Crossvine | |
| Boerhavia linearifolia | Narrowleaf spiderling | |
| Bouvardia ternifolia | Scarlet bouvardia Firecracker bush Trompetilla Clavillo | |
| Callicarpa americana | American beautyberry French mulberry | |
| Catalpa bignonioides | Southern catalpa Cigar tree Indian bean | |
| Callirhoe digitata | Finger poppy-mallow Poppy mallow Standing winecup Wine cup Winecup | |
| Castilleja indivisa | Entireleaf indian paintbrush Texas paintbrush Indian paintbrush Scarlet paintbrush Entire-leaf indian-paintbrush | |
| Castilleja integra | Wholeleaf Indian paintbrush Squawfeather | |
| Calochortus kennedyi | Desert mariposa lily Desert mariposa Red mariposa-lily Flame mariposa | |
| Campsis radicans | Trumpet creeper Trumpet vine Common trumpet creeper Cow vine | |
| Calylophus serrulatus | Yellow sundrops Yellow evening primrose Plains evening primrose | |
| Castilleja sessiliflora | Downy painted cup Downy paintbrush Great Plains paintbrush Great Plains indian-paintbrush | |
| Calopogon tuberosus | Tuberous grasspink Grass pink | |
| scientific name | common name(s) | image gallery |