Guadalupe Mountains violet |
Viola guadalupensis |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
True |
Guadalupe Mountains; bullet hole openings in dolomitized limestone rock faces, in the shade of an open Douglas-fir (Pseudotsuga menziesii) woodland at about 2,450 m (8,000 ft) elevation; flowering March-May |
rock grape |
Vitis rupestris |
Plants |
Not Listed |
Not Listed |
G3 |
S1 |
False |
Occurs on rocky limestone slopes and in streambeds; Perennial; Flowering March-May; Fruiting May-July |
Texas willkommia |
Willkommia texana var. texana |
Plants |
Not Listed |
Not Listed |
G3G4T3 |
S3 |
True |
Mostly in sparsely vegetated shortgrass patches within taller prairies on alkaline or saline soils on the Coastal Plain (Carr 2015). |
small-leaved yellow velvet-leaf |
Wissadula parvifolia |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
True |
Occurs on sandy loams or clays in shrublands or woodlands on gently undulating terrain of the Holocene sand sheet over the Goliad Formation. |
sticky tansy aster |
Xanthisma viscidum |
Plants |
Not Listed |
Not Listed |
G3 |
S2 |
False |
Occurs on calcareous or sandy soils in Chihuahuan Desert shrublands or mesquite grasslands. |
Wright's machaeranthera |
Xylorhiza wrightii |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
False |
Desert grasslands in the Trans-Pecos (Carr 2015). |
Chapman's yellow-eyed grass |
Xyris chapmanii |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
False |
Mostly in soft, spongy, peaty substrates in deep muck seepage bogs; mostly in muckiest parts of hillside seepage bogs; flowering August-September, with seed maturing September-October |
Drummond's yellow-eyed grass |
Xyris drummondii |
Plants |
Not Listed |
Not Listed |
G3G4 |
S2 |
False |
Wet sand or peaty sand in hillside seepage bogs; in Texas, exclusively over the Catahoula formation, elsewhere also found along contact between Willis and Bentley formations; flowering mid June-mid August, seeds developing mid-late summer and early fall |
roughleaf yellow-eyed grass |
Xyris scabrifolia |
Plants |
Not Listed |
Not Listed |
G3 |
S2 |
False |
Wet sand and/or peat in acid seepage areas or hillside seepage bogs on the Catahoula formation or near the contact of the Catahoula and the Willis formations, in open areas and in partial shade of evergreen shrub thickets, often on Sphagnum hummocks; flowering late July-early September |
Texas shrimp-plant |
Yeatesia platystegia |
Plants |
Not Listed |
Not Listed |
G3G4 |
S4 |
False |
Occurs very sparingly in a variety of shrublands and canyon woodlands at widely scattered locations; Perennial; Flowering/Fruiting April-Dec |
nodding yucca |
Yucca cernua |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
True |
Openings in and margins of pine-hardwood forests on brownish acid clays of the Redco Series; flowering/fruiting June-November |
Glen Rose yucca |
Yucca necopina |
Plants |
Not Listed |
Not Listed |
G1G2 |
S3 |
True |
Grasslands on sandy soils and limestone outcrops; flowering April-June |
Shinners' tickle-tongue |
Zanthoxylum parvum |
Plants |
Not Listed |
Not Listed |
G2 |
S2 |
True |
Understory of maple-oak woodlands or evergreen oak shinnery on rocky, often shallow, well-drained, neutral, non-calcareous loams underlain by rhyolite, tuff trachyandesite, or other igneous rock, at elevations between about 1,350-1,750 m (4,400-5,750 ft); flowering late March-early April, before the leaves have fully expanded |
Refugio rainlily |
Zephyranthes refugiensis |
Plants |
Not Listed |
Not Listed |
G2G3 |
S2S3 |
True |
Occurs on deep heavy black clay soils or sandy loams in swales or drainages on herbaceous grasslands or shrublands on level to rolling landscapes underlain by the Lissie Formation. |
Small's rainlily |
Zephyranthes smallii |
Plants |
Not Listed |
Not Listed |
G1G2Q |
S1 |
True |
Open low fields, swales and ditches on sandy loam. Flowering early fall (Sep--Oct) (Flagg, Smith & Flory 2002). |
Texas wild-rice |
Zizania texana |
Plants |
LE |
E |
G1 |
S1 |
True |
Spring-fed river, in clear, cool, swift water mostly less than 1 m deep, with coarse sandy soils rather than finer clays; flowering year-round, peaking March-June |
smooth softshell |
Apalone mutica |
Reptiles |
Not Listed |
Not Listed |
G5 |
S3 |
False |
Aquatic: Large rivers and streams; in some areas also found in lakes and impoundments (Ernst and Barbour 1972). Usually in water with sandy or mud bottom and few aquatic plants. Often basks on sand bars and mudflats at edge of water. Eggs are laid in nests dug in high open sandbars and banks close to water, usually within 90 m of water (Fitch and Plummer 1975). |
gray-checkered whiptail |
Aspidoscelis dixoni |
Reptiles |
Not Listed |
Not Listed |
G5 |
S2 |
False |
Terrestrial: The habitat comprises rocky plains, dry washes, canyon bottoms, and desert scrub (ocotillo, creosotebush, opuntia) (Bartlett and Bartlett 1999); generally on rocky soils of desert shrublands and degraded grasslands on alluvial benches, canyon bottoms, and lower southwestern mountain slopes (Scudday 1973, Degenhardt et al. 1996). |
northern scarlet snake |
Cemophora coccinea |
Reptiles |
Not Listed |
T |
G5 |
S4 |
False |
Terrestrial: Prefers well drained soils with pine, hardwood, or mixed hardwood scrub in addition to open grassland habitats with appropriate soils. |
Texas scarlet snake |
Cemophora lineri |
Reptiles |
Not Listed |
T |
G2 |
S1S2 |
True |
Terrestrial: Prefers well drained soils with a variety of forest, grassland, and scrub habitats. |
reticulated gecko |
Coleonyx reticulatus |
Reptiles |
Not Listed |
Not Listed |
G3 |
S4 |
False |
Terrestrial: This lizard occurs in canyons and other rocky areas in desert regions. Apparently favors crevice microhabitats regardless of rock type. |
black-striped snake |
Coniophanes imperialis |
Reptiles |
Not Listed |
T |
G4G5 |
S2S3 |
False |
Terrestrial: Occurs in native thorn scrub and woodlands a well as modfied urban areas. Prefers warm, moist microhabitats, and sandy soils. |
timber (canebrake) rattlesnake |
Crotalus horridus |
Reptiles |
Not Listed |
Not Listed |
G4 |
S4 |
False |
Terrestrial: Swamps, floodplains, upland pine and deciduous woodland, riparian zones, abandoned farmland. Limestone bluffs, sandy soil or black clay. Prefers dense ground cover, i.e. grapevines, palmetto. |
western rattlesnake |
Crotalus viridis |
Reptiles |
Not Listed |
Not Listed |
G5 |
S5 |
False |
Terrestrial: Dry desert and prairie grasslands, shrub desert rocky hillsides; edges of arid and semi-arid river breaks. |
reticulate collared lizard |
Crotaphytus reticulatus |
Reptiles |
Not Listed |
Not Listed |
G3 |
S4 |
False |
Terresstrial: Requires open brush-grasslands; thorn-scrub vegetation, usually on well-drained rolling terrain of shallow gravel, caliche, or sandy soils; often on scattered flat rocks below escarpments or isolated rock outcrops among scattered clumps of prickly pear and mesquite |