Species of Greatest Conservation Need
1124 species
| Scientifc Name | Common Name | Taxonomic Group | SGCN Status | Federal Status | State Status | Global Rank | State Rank | Endemic | General Habitat Type(s) |
|---|---|---|---|---|---|---|---|---|---|
| Caesalpinia phyllanthoides | South Texas rushpea | Plants | Yes | Not Listed | Not Listed | G2? | S1 | No | Tamaulipan thorn shrublands or grasslands on very shallow sandy to clayey soils over calcareous sandstone and caliche; flowering in spring, sometimes later in growing season, perhaps in response to rainfall |
| Calliandra biflora | two-flower stick-pea | Plants | Yes | Not Listed | Not Listed | G3 | S3 | No | primarily in open areas on caliche outcrops or in shallow sandy soils over caliche; Perennial; Flowering/Fruiting May-Aug |
| Callirhoe scabriuscula | Texas poppy-mallow | Plants | Yes | E 01/13/1981 |
E 04/29/1983 |
G2 | S2 | Yes | Grasslands and open oak shrublands or mesquite woodlands on deep, loose sands (Tivoli Series) of ancient and contemporary Colorado River terraces; flowering (April-) May-June; in late July the plants die back to the taproots, in late August-September basal rosettes form, in April the flowering stems bolt |
| Calopogon oklahomensis | Oklahoma grass pink | Plants | Yes | Not Listed | Not Listed | G2 | S1S2 | No | Mesic, acidic, sandy to loamy prairies, pine savannas, oak woodlands, edges of bogs, and frequently mowed meadows (Goldman, Magrath & Catling 2002). Flowering March-July. |
| Campanula reverchonii | basin bellflower | Plants | Yes | Not Listed | Not Listed | G2 | S2 | Yes | Among scattered vegetation on loose gravel, gravelly sand, and rock outcrops on open slopes with exposures of igneous and metamorphic rocks; may also occur on sandbars and other alluvial deposits along major rivers; flowering May-July |
| Cardamine macrocarpa var. texana | Texas largeseed bittercress | Plants | Yes | Not Listed | Not Listed | G3T2 | S2 | No | Seasonally moist, loamy soils in pine-oak woodlands at high elevations in the Chisos and Davis mountains; also moderate elevations in oak-juniper woodlands in Kinney and Uvalde counties; flowering in early spring and usually withering by the beginning of summer, sometimes persisting and flowering intermittently through autumn depending on rainfall |
| Cardiospermum dissectum | Chihuahua balloon-vine | Plants | Yes | Not Listed | Not Listed | G3 | S3 | No | Thorn shrublands or low woodlands on well to excessively well drained, calcareous, sandy to gravelly soils in drier uplands of the Lower Rio Grande Valley, in areas underlain by the Goliad formation, Catahoula and Frio formations undivided, Jackson Group, and other Eocene formations; during drought conditions the normally inconspicuous slender twining vine turns a more conspicuous deep reddish-purple; flowering (April-) July-September, probably throughout the growing season in response to rainfall. |
| Carex decomposita | cypress knee sedge | Plants | Yes | Not Listed | Not Listed | G3G4 | S1 | No | Occurs in shallow water or on baldcypress stumps and logs in wooded ponds or swamps; Perennial; Flowering/Fruiting April-May |
| Carex edwardsiana | canyon sedge | Plants | Yes | Not Listed | Not Listed | G3G4 | S3S4 | Yes | Dry-mesic decidous and deciduous-juniper woodlands in canyons and ravines, usually in clay loams very high in calcium on rocky banks and slopes just above streams and stream beds. Carex edwardsiana usually grows near C. planostachys. Fruiting spring (Ball, Reznicek, and 2003). |
| Carex mckittrickensis | Guadalupe Mountains sedge | Plants | Yes | Not Listed | Not Listed | G1 | S1 | Yes | Only known from the Guadalupe Mountains (Carr 2015). |
| Carex shinnersii | Shinner's sedge | Plants | Yes | Not Listed | Not Listed | G3 | S2 | No | Occurs in ditches and swales in prairie landscapes (Carr 2015). |
| Chaetopappa hersheyi | mat leastdaisy | Plants | Yes | Not Listed | Not Listed | G2 | S2 | No | Dry limestone cliffs (often steep or vertical), ledges, boulders, and other exposed Permian limestone surfaces at 1,500-2,400 m (4,900-7,900 ft) in higher mountain canyons of the Guadalupe Mountains; flowering May-August |
| Chaetopappa imberbis | awnless leastdaisy | Plants | Yes | Not Listed | Not Listed | G3 | S3 | Yes | In woodlands on loams of Carrizo sand (TEX-LL specimens Carr 23875, 12507). Flowering and fruiting during Mar - May. |
| Chaetopappa parryi | Parry's leastdaisy | Plants | Yes | Not Listed | Not Listed | G3 | S1 | No | Rocky slopes, talus, crevices, chaparral, oak, oak-juniper, or oak-pine-fir woods, 1400-1600 m elevation; Perennial; Flowering May-Aug, Fruiting Aug; Flowering May-Sept (-Oct) |
| Chloris texensis | Texas windmill grass | Plants | Yes | Not Listed | Not Listed | G2 | S2 | Yes | Sandy to sandy loam soils in relatively bare areas in coastal prairie grassland remnants, often on roadsides where regular mowing may mimic natural prairie fire regimes; flowering in fall |
| Chrysothamnus spathulatus | Douglas rabbitbrush | Plants | Yes | Not Listed | Not Listed | G3 | S2 | No | Occurs in the Guadalupe Mountains of Tex. and adjacent N.M. at 0-6000 feet; Perennial; Fruiting Aug-Nov |
| Cirsium turneri | cliff thistle | Plants | Yes | Not Listed | Not Listed | G3 | S3 | No | Found mostly in fractures of vertical limestone cliff-faces in canyons along the Rio Grande; Perennial; Flowering April-Dec; Fruiting June-Oct |
| Cirsium wrightii | Wright's marsh thistle | Plants | Yes | T 05/25/2023 |
Not Listed | G2 | S1 | No | Marshy wetlands (cienegas) near springs in otherwise semi-arid to arid areas. It requires saturated soils with surface or subsurface water flow (USFWS 2015). |
| Clematis carrizoensis | Carrizo Sands leather-flower | Plants | Yes | Not Listed | Not Listed | G2 | S2 | Yes | Occurs in the margins of post oak woodlands on deep sands of Carrizo formation (Carr 2015). Flowering April-August (sometimes as late as October). |
| Clematis texensis | scarlet leather-flower | Plants | Yes | Not Listed | Not Listed | G3G4 | S3S4 | Yes | Usually in oak-juniper woodlands in mesic rocky limestone canyons or along perennial streams; Perennial; Flowering March-July; Fruiting May-July |
| Cleomella longipes | stalked rhombopod | Plants | Yes | Not Listed | Not Listed | G3G4 | S3 | No | Locally common in sparingly vegetated sandy or alkaline soils and along margins of seasonal wetlands in the Trans-Pecos (Carr 2015). |
| Colubrina stricta | Comal snakewood | Plants | Yes | Not Listed | Not Listed | G2 | S1 | No | In El Paso County, found in a patch of thorny shrubs in colluvial deposits and sandy soils at the base of an igneous rock outcrop; the historic Comal County record does not describe the habitat; in Mexico ,found in shrublands on calcareous, gravelly, clay soils with woody associates; flowering late spring or early summer |
| Coreopsis intermedia | goldenwave tickseed | Plants | Yes | Not Listed | Not Listed | G3 | S3 | No | In deep sandy soils of sandhills in openings in or along margins of post oak woodlands and pine-oak forests of east Texas; Perennial; Flowering/Fruiting May-Aug |
| Coryphantha macromeris var. runyonii | Runyon's cory cactus | Plants | Yes | Not Listed | Not Listed | G5T2T3 | S2S3 | No | Gravelly to sandy or clayey, calcareous, sometimes gypsiferous or saline soils, often over the Catahoula and Frio formations, on gentle hills and slopes to the flats between, at elevations ranging from 10 to 150 m (30 to 500 ft); ?late spring or early summer, November, fruit has been collected in August |
| Coryphantha nickelsiae | Nickels' cory cactus | Plants | Yes | Not Listed | Not Listed | G2 | SH | No | Limestone outcrops and nearby alluvial or gravelly soils on hills or plains in grasslands or shrublands at low elevations; known sites in Mexico have been described as Chihuahuan Desert scrub; flowering August through September |