Species of Greatest Conservation Need
1124 species
| Scientifc Name | Common Name | Taxonomic Group | Federal Status | State Status | Global Rank | State Rank | Endemic |
|---|---|---|---|---|---|---|---|
| Astragalus mollissimus var. marcidus | withered woolly loco | Plants | Not Listed | Not Listed | G5T2 | S2 | Yes |
| Astragalus reflexus | Texas milk vetch | Plants | Not Listed | Not Listed | G3 | S3 | Yes |
| Astragalus soxmaniorum | Soxman's milkvetch | Plants | Not Listed | Not Listed | G3 | S3 | No |
| Astragalus waterfallii | Waterfall's milkvetch | Plants | Not Listed | Not Listed | G3? | S3 | No |
| Astragalus wrightii | Wright's milkvetch | Plants | Not Listed | Not Listed | G3 | S3 | Yes |
| Astrophytum asterias | star cactus | Plants | E 10/18/1993 |
E 01/30/1997 |
G1G2 | S1 | No |
| Atriplex klebergorum | Kleberg saltbush | Plants | Not Listed | Not Listed | G2 | S2 | Yes |
| Ayenia limitaris | Texas ayenia | Plants | E 08/24/1994 |
E 01/30/1997 |
G2 | S1 | No |
| Bartonia paniculata ssp. texana | Texas screwstem | Plants | Not Listed | Not Listed | G2G3 | S2S3 | No |
| Batesimalva violacea | purple gay-mallow | Plants | Not Listed | Not Listed | G1 | S1 | No |
| Bauhinia lunarioides | Anacacho orchid tree | Plants | Not Listed | Not Listed | G3 | S1 | No |
| Berberis swaseyi | Texas barberry | Plants | Not Listed | Not Listed | G3 | S3 | Yes |
| Blepharidachne bigelovii | Bigelow's desert grass | Plants | Not Listed | Not Listed | G3 | S3 | No |
| Bonamia ovalifolia | bigpod bonamia | Plants | Not Listed | Not Listed | G1 | S1 | No |
| Bouteloua kayi | Kay's grama | Plants | Not Listed | Not Listed | G1 | S1 | Yes |
| Brazoria arenaria | sand Brazos mint | Plants | Not Listed | Not Listed | G3 | S3 | Yes |
| Brazoria enquistii | Enquist's sandmint | Plants | Not Listed | Not Listed | G2 | S2 | Yes |
| Brazoria truncata var. pulcherrima | Centerville Brazos-mint | Plants | Not Listed | Not Listed | G4T3 | S3 | Yes |
| Brickellia baccharidea | resin-leaf brickellbush | Plants | Not Listed | Not Listed | G3 | S1 | No |
| Brickellia dentata | gravelbar brickellbush | Plants | Not Listed | Not Listed | G3G4 | S3S4 | Yes |
| Brickellia eupatorioides var. gracillima | narrowleaf brickellbush | Plants | Not Listed | Not Listed | G5T3 | S3 | Yes |
| Brickellia hinckleyi var. hinckleyi | Hinckley's brickellbush | Plants | Not Listed | Not Listed | G2T2 | S2 | Yes |
| Brickellia hinckleyi var. terlinguensis | Terlingua brickellbush | Plants | Not Listed | Not Listed | G2TH | SH | Yes |
| Brickellia parvula | Mt. Davis brickellbush | Plants | Not Listed | Not Listed | G3 | S1 | No |
| Brongniartia minutifolia | little-leaf brongniartia | Plants | Not Listed | Not Listed | G2 | S1 | No |