small fryxell-wort |
Fryxellia pygmaea |
Plants |
Not Listed |
Not Listed |
G1 |
SH |
False |
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 |
white firewheel |
Gaillardia aestivalis var. winkleri |
Plants |
Not Listed |
Not Listed |
G5T2 |
S2 |
True |
Open pine-oak woodlands and farkleberry sandhills in deep, loose, well-drained whitish sands; flowering late spring (May-June) and sporadically through early fall |
Watson's milk-pea |
Galactia watsoniana |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
True |
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. |
cliff bedstraw |
Galium correllii |
Plants |
Not Listed |
Not Listed |
G2 |
S1 |
False |
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 |
Boquillas lizardtail |
Gaura boquillensis |
Plants |
Not Listed |
Not Listed |
G3 |
S2 |
False |
Mostly in sandy soils in desert canyons and arroyos, occasionally in gravelly limestone soils in Chihuahuan Desert scrub at low elevations; flowering March-August |
prairie butterfly-weed |
Gaura triangulata |
Plants |
Not Listed |
Not Listed |
G3G4 |
S3 |
False |
Open sandy areas; Annual; Flowering March-June |
woolly butterfly-weed |
Gaura villosa ssp. parksii |
Plants |
Not Listed |
Not Listed |
G5T3 |
S3 |
True |
Flats and hills of red sand of Rio Grande Plains (Raven and Gregory 1972). April-Oct. |
brush-pea |
Genistidium dumosum |
Plants |
Not Listed |
T |
G1 |
S1 |
False |
Chihuahuan Desert scrub on rocky limestone hills at lower elevations; in Coahuila, also found on volcanic tuff and sandstone; flowering June-October |
earth fruit |
Geocarpon minimum |
Plants |
LT |
T |
G2 |
S1 |
False |
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 |
South Texas gilia |
Gilia ludens |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
True |
Occurs in open areas in shrublands on shallow sandy loam over rock outcrops; Perennial; Flowering Dec-April; Fruiting March |
Texas greasebush |
Glossopetalon texense |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
True |
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 |
plains gumweed |
Grindelia oolepis |
Plants |
Not Listed |
Not Listed |
G2 |
S2 |
False |
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 |
Blumberg's centaury |
Gyrandra blumbergiana |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
True |
Known from perennial seeps and associated drainages in limestone, sandstone, or gypseous canyons in the Chihuahuan Desert. |
McKittrick pennyroyal |
Hedeoma apiculatum |
Plants |
Not Listed |
Not Listed |
G3 |
S2 |
False |
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 |
hairy false pennyroyal |
Hedeoma mollis |
Plants |
Not Listed |
Not Listed |
G3G4 |
S3S4 |
True |
Occurs in various mountain ranges (Carr 2015) |
old blue pennyroyal |
Hedeoma pilosa |
Plants |
Not Listed |
Not Listed |
GH |
SH |
True |
Single historic record from open exposed limestone; flowering period unknown. |
neglected sunflower |
Helianthus neglectus |
Plants |
Not Listed |
Not Listed |
G2Q |
S2 |
False |
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 |
Shinner's sunflower |
Helianthus occidentalis ssp. plantagineus |
Plants |
Not Listed |
Not Listed |
G5T4 |
S4 |
False |
�Mostly in prairies on the Coastal Plain, with several slightly disjunct populations in the Pineywoods and South Texas Brush Country. |
Pecos sunflower |
Helianthus paradoxus |
Plants |
LT |
T |
G2 |
S1 |
False |
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 |
Dimmit sunflower |
Helianthus praecox ssp. hirtus |
Plants |
Not Listed |
Not Listed |
G4T2Q |
S2 |
True |
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 |
Texas sunflower |
Helianthus praecox ssp. praecox |
Plants |
Not Listed |
Not Listed |
G4T2 |
S2 |
True |
Sandy open areas along the upper Texas coast; Annual; Flowering April-Sept |
Mexican hesperaloe |
Hesperaloe funifera ssp. funifera |
Plants |
Not Listed |
Not Listed |
G3TNR |
S1 |
False |
Shrubland |
red yucca |
Hesperaloe parviflora |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
False |
Shrublands on dry limestone slopes; Perennial; Flowering April-May; Fruiting May-June |
Mexican mud-plantain |
Heteranthera mexicana |
Plants |
Not Listed |
Not Listed |
G2G3 |
S1 |
False |
Wet clayey soils of resacas and ephemeral wetlands in South Texas and along margins of playas in the Panhandle; flowering June-December, only after sufficient rainfall |
Glass Mountains coral-root |
Hexalectris nitida |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
False |
Apparently rare in mixed woodlands in canyons in the mountains of the Brewster County, but encountered with regularity, albeit in small numbers, under Juniperus ashei in woodlands over limestone on the Edwards Plateau, Callahan Divide and Lampasas Cutplain; Perennial; Flowering June-Sept; Fruiting July-Sept |