Species of Greatest Conservation Need

1124 species
Taxonomic Group
Federal Status
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Species of Greatest Conservation Need (Updated: 06/16/2025)
Scientifc Name Common Name Taxonomic Group SGCN Status Federal Status State Status Global Rank State Rank Endemic General Habitat Type(s)
Eurytaenia hinckleyi Hinckley's spreadwing Plants Yes Not Listed Not Listed G3 S3 Yes Loose sandy soils of the Monahans/Kermit Sandhills; Annual; Flowering/Fruiting May-July
Eysenhardtia spinosa spiny kidney-wood Plants Yes Not Listed Not Listed G2 S2 No Grasslands or sparse shrublands on igneous outcrops or limestone hills; in the Chinati Mountains on rocky hills and gravelly drainages of mixed igneous origin; flowering July - October
Fendlera linearis stiff fendlerbush Plants Yes Not Listed Not Listed G3 S1 No Locally common in several locations in the Chisos Mountains and the Solitario (Carr 2015).
Festuca ligulata Guadalupe fescue Plants Yes E
10/10/2017
E
03/30/2020
G1 S1 No Pine-oak-juniper woodlands on mesic slopes and in creek bottoms above 1800 m (5900 ft); Chisos Mountains substrates are gravelly and sandy loams derived from igneous materials; Guadalupe Mountains substrates are unknown but presumed to be loamy soils over limestone; flowering August-September, occasionally in spring after sufficient rainfall
Festuca versuta Texas fescue Plants Yes Not Listed Not Listed G3 S3 No Occurs in mesic woodlands on limestone-derived soils on stream terraces and canyon slopes; Perennial; Flowering/Fruiting April-June
Flyriella parryi Shinner's brickellbush Plants Yes Not Listed Not Listed G3 S3 No Dry rocky limestone slopes; Perennial; Flowering/Fruiting April-June
Frankenia johnstonii Johnston's frankenia Plants Yes DL
02/11/2016
Not Listed G3 S3 No Dwarf shrublands on strongly saline, highly alkaline, calcareous or gypseous, clayey to sandy soils of valley flats or rocky slopes; mapped soils at many sites are of the Catarina and/or Maverick Series, other mapped soils include Copita, Brennan, Zapata, and Montell series; most sites are underlain by Eocene sandstones and clays of the Jackson Group or the Yegua and Laredo formations; a few are underlain by El Pico clay or the Catahoula and Frio formations shrublands; flowering throughout the growing season depending upon rainfall
Fraxinus papillosa Chihuahua ash Plants Yes Not Listed Not Listed G2G3Q S1 No Occurs in the canyons of the Chinati Mountains (Carr 2015).
Fryxellia pygmaea small fryxell-wort Plants Yes Not Listed Not Listed G1 SH No West Texas, but actual county not identified; in Coahuila, Mexico, dry, open, Chihuahuan Desert hillside at an elevation of about 1250 m (4100 ft); probably flowers summer and fall, perhaps in response to rainfall
Gaillardia aestivalis var. winkleri white firewheel Plants Yes Not Listed Not Listed G5T2 S2 Yes Open pine-oak woodlands and farkleberry sandhills in deep, loose, well-drained whitish sands; flowering late spring (May-June) and sporadically through early fall
Galactia watsoniana Watson's milk-pea Plants Yes Not Listed Not Listed G1 S1 Yes Usually growing on shaded, gently sloping terraces above creeks in mesic canyons of the southwestern Edwards Plateau. Vegetation is most often sparse with Quercus muehlenbergii and Acer grandidentatum being the dominant plants.
Galium correllii cliff bedstraw Plants Yes Not Listed Not Listed G2 S1 No Dry, steep or vertical limestone cliff faces of various exposures in Chihuahuan Desert along Rio Grande, Pecos River, and their tributaries, at elevations of 350-500 m (1150-1650 ft), resembles cliff swallow nests that are also found on limestone cliffs; flowering April-November, fruiting May-December
Genistidium dumosum brush-pea Plants Yes Not Listed T
03/30/2020
G1 S1 No Chihuahuan Desert scrub on rocky limestone hills at lower elevations; in Coahuila, also found on volcanic tuff and sandstone; flowering June-October
Geocarpon minimum earth fruit Plants Yes T
06/16/1987
T
04/04/2005
G2 S1 No In Texas, found on vegetated edges of slick spots in saline barren complex just above floodplain of Neches River, soils are claypan, hold late winter rains, with a spongy feel to the soil, drying quickly into hardened cement; topography includes pimple mounds with micro highs/lows; elsewhere, occurs in open, sparingly vegetated glades on shallow soils over sandstone outcrops; sometimes in shallow depressions within such areas and saline prairies; these soils are very thin and high in magnesium or sodium; mostly found on the cryptogamic lip along slick spot perimeter; flowering late February-March
Gilia ludens South Texas gilia Plants Yes Not Listed Not Listed G2? S3 Yes Occurs in open areas in shrublands on shallow sandy loam over rock outcrops; Perennial; Flowering Dec-April; Fruiting March
Glossopetalon texense Texas greasebush Plants Yes Not Listed Not Listed G1 S1 Yes Dry limestone ledges, chalk bluffs, and limestone outcrops; one population is on an extremely steep slope, inaccessible to most herbivores; flowering period uncertain, including at least June-December
Grindelia oolepis plains gumweed Plants Yes Not Listed Not Listed G2 S2 No Coastal prairies on heavy clay (blackland) soils, often in depressional areas, sometimes persisting in areas where management (mowing) may maintain or mimic natural prairie disturbance regimes; crawfish lands; on nearly level Victoria clay, Edroy clay, claypan, possibly Greta within Orelia fine sandy loam over the Beaumont Formation, and Harlingen clay; roadsides, railroad rights-of-ways, vacant lots in urban areas, cemeteries; flowering April-December
Gyrandra blumbergiana Blumberg's centaury Plants Yes Not Listed Not Listed G1 S1 Yes Known from perennial seeps and associated drainages in limestone, sandstone, or gypseous canyons in the Chihuahuan Desert.
Hebecarpa palmeri Palmer's milkwort Plants Yes Not Listed Not Listed G3 S2 No Limestone slopes; Perennial; Flowering April-July; Fruiting June-Oct
Hedeoma apiculata McKittrick pennyroyal Plants Yes DL
09/22/1993
Not Listed G3 S2 No Boulders, cliffs, ledges, and other exposed Permian limestone surfaces in higher mountain canyons, usually on north facing slopes or similarly sheltered, relatively mesic sites, but occasionally in more nondescript soil pockets; surrounded by oak-maple woodland; flowering July-September
Hedeoma mollis hairy false pennyroyal Plants Yes Not Listed Not Listed G3G4 S3S4 Yes Occurs in various mountain ranges (Carr 2015)
Hedeoma pilosa old blue pennyroyal Plants Yes Not Listed Not Listed GH SH Yes Single historic record from open exposed limestone; flowering period unknown.
Helianthus neglectus neglected sunflower Plants Yes Not Listed Not Listed G2Q S2 No Deep sands on rolling hills and dunes of Pleistocene sand sheets, often associated with Havards shin oak dwarf woodlands or mesquite-sand sage woodlands; flowering July-September
Helianthus paradoxus Pecos sunflower Plants Yes T
10/20/1999
T
07/18/2001
G2 S1 No Restricted to saline, calcareous, heavy-textured soils around cienegas; usually most abundant on perennially wet soils of subirrigated terraces just above the wettest sites; flowering August-November
Helianthus praecox ssp. hirtus Dimmit sunflower Plants Yes Not Listed Not Listed G4T2Q S2 Yes Bluestem midgrass grasslands on loose, well-drained, slightly acid, deep, sandy soils, mostly of Antosa-Bobilla Association and Poteet Series; underlain by Carrizo Sand Formation; flowering late summer-fall, dependent on periods of abundant rainfall, populations fluctuate greatly based on rainfall; apparently dependent on the maintenance of grassland habitat