Species of Greatest Conservation Need
427 species
| Scientifc Name | Common Name | Taxonomic Group | Federal Status | State Status | Global Rank | State Rank | Endemic |
|---|---|---|---|---|---|---|---|
| Mammillaria wrightii var. wrightii | Wright's fishhook cactus | Plants | Not Listed | Not Listed | G4T3 | SH | No |
| Manfreda longiflora | St. Joseph's staff | Plants | Not Listed | Not Listed | G2 | S2 | No |
| Manfreda sileri | Siler's huaco | Plants | Not Listed | Not Listed | G3 | S3 | No |
| Manihot walkerae | Walker's manioc | Plants | E 10/02/1991 |
E 03/30/1993 |
G2 | S1 | No |
| Matelea atrostellata | black corona milkvine | Plants | Not Listed | Not Listed | G1? | S1 | Yes |
| Matelea brevicoronata | shortcrown milkvine | Plants | Not Listed | Not Listed | G3 | S3 | Yes |
| Matelea edwardsensis | plateau milkvine | Plants | Not Listed | Not Listed | G3 | S3 | Yes |
| Matelea radiata | Falfurrias milkvine | Plants | Not Listed | Not Listed | G1 | S1 | Yes |
| Matelea sagittifolia | arrowleaf milkvine | Plants | Not Listed | Not Listed | G3 | S3 | No |
| Matelea texensis | Texas milkvine | Plants | Not Listed | Not Listed | G1 | S1 | Yes |
| Monarda maritima | seaside beebalm | Plants | Not Listed | Not Listed | G2Q | S2 | Yes |
| Monarda stanfieldii | Stanfield's beebalm | Plants | Not Listed | Not Listed | G3 | S3 | Yes |
| Monarda viridissima | Texas beebalm | Plants | Not Listed | Not Listed | G3 | S3 | Yes |
| Muhlenbergia villiflora var. villosa | villous muhly | Plants | Not Listed | Not Listed | G5T3 | S2 | No |
| Nemophila sayersensis | Sayersville blue eyes | Plants | Not Listed | Not Listed | G2 | S2 | Yes |
| Nissolia platycalyx | broadsepal nissolia | Plants | Not Listed | Not Listed | G3 | S1 | No |
| Nolina arenicola | sand sacahuiste | Plants | Not Listed | Not Listed | G2Q | S2 | Yes |
| Oenothera boquillensis | Boquillas lizardtail | Plants | Not Listed | Not Listed | G3 | S2 | No |
| Oenothera cinerea ssp. parksii | woolly butterfly-weed | Plants | Not Listed | Not Listed | G5T3 | S3 | Yes |
| Oenothera cordata | heartleaf evening-primrose | Plants | Not Listed | Not Listed | G3 | S3 | Yes |
| Oenothera coryi | Cory's evening-primrose | Plants | Not Listed | Not Listed | G3 | S3 | Yes |
| Oenothera sessilis | Grand Prairie evening primrose | Plants | Not Listed | Not Listed | G5T2 | SH | No |
| Oenothera triangulata | prairie butterfly-weed | Plants | Not Listed | Not Listed | G3G4 | S3 | No |
| Onosmodium helleri | Heller's marbleseed | Plants | Not Listed | Not Listed | G3 | S3 | Yes |
| Opuntia arenaria | sand prickly-pear | Plants | Not Listed | Not Listed | G2 | S2 | No |