scented croton |
Croton suaveolens |
Plants |
Not Listed |
Not Listed |
G3 |
S2 |
False |
Grasslands at middle elevations in mountains; Perennial; Flowering April-Nov; Fruiting June-Nov |
Terlingua Creek cat's-eye |
Cryptantha crassipes |
Plants |
LE |
E |
G1 |
S1 |
True |
On low, seemingly barren, xeric hills of gypseous clay and chalky shales of the Boquillas Formation; flowering late March-early June; fruiting April-July |
Payson's hiddenflower |
Cryptantha paysonii |
Plants |
Not Listed |
Not Listed |
G3 |
S1 |
False |
Rocky limestone slopes in mountains; Perennial; Flowering May; Fruiting May-June |
marsh-elder dodder |
Cuscuta attenuata |
Plants |
Not Listed |
Not Listed |
G1G3 |
S2 |
False |
Parasitizes a particular sumpweed (Iva annua) almost exclusively as well as ragweed and heath aster. Host plants typically found in open, disturbed habitats like fallow fields and creek bottomlands; Annual; Flowering late summer through October |
tree dodder |
Cuscuta exaltata |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
False |
Parasitic on various Quercus, Juglans, Rhus, Vitis, Ulmus, and Diospyros species as well as Acacia berlandieri and other woody plants; Annual; Flowering May-Oct; Fruiting July-Oct |
giant sharpstem umbrella-sedge |
Cyperus cephalanthus |
Plants |
Not Listed |
Not Listed |
G3?Q |
S1 |
False |
In Texas on saturated, fine sandy loam soils, along nearly level fringes of deep prairie depressions; also in depressional area within coastal prairie remnant on heavy black clay; in Louisiana, most sites are coastal prairie on poorly drained sites, some on slightly elevated areas surrounded by standing shallow water, and on moderately drained sites; soils include very strongly acid to moderately alkaline silt loams and silty clay loams; flowering/fruiting May-June, August-September, and possibly other times in response to rainfall |
Mohlenbrock's sedge |
Cyperus grayioides |
Plants |
Not Listed |
Not Listed |
G3G4 |
S3S4 |
False |
Deep sand and sandy loam in dry, almost barren openings in upland longleaf pine savannas, mixed pine-oak forests, and post oak woodlands; Occurs primarily in deep, periodically disturbed sandy soils in open areas maintained by factors such as wind, erosion, or fire. This species does not occur in shaded areas or in areas of high competition with other herbaceous species. Habitats include remnant sand prairies, sandy fields, sand blow outs, sandhill woodlands, pine barrens, and open barrens in which the slope is sufficient to produce sand erosion. May also occur in areas where the soils have been disturbed by logging or road construction; Perennial |
dune umbrella-sedge |
Cyperus onerosus |
Plants |
Not Listed |
T |
G2 |
S2 |
True |
Moist to wet sand in swales and other depressions among active or partially stabilized sand dunes; flowering/fruiting late summer-fall |
Southern lady's-slipper |
Cypripedium kentuckiense |
Plants |
Not Listed |
Not Listed |
G3 |
S1 |
False |
Primarily restricted to calciphilic hardwood slope forests, mesic ravines, hardwood terraces above floodplains, and seepage slopes; flowering late March-May |
dune dalea |
Dalea austrotexana |
Plants |
Not Listed |
Not Listed |
G2 |
S2 |
True |
Restricted to deep loose sands of active and somewhat stabilized dunes in South Texas (Carr 2015). |
Cox's dalea |
Dalea bartonii |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
True |
Semi-desert shortgrass grasslands with scattered pinyon pine and juniper in gravelly soils on limestone hills; probably flowering in late spring, fruiting in late summer-early fall, may flower in response to rainfall |
Hall's prairie clover |
Dalea hallii |
Plants |
Not Listed |
Not Listed |
G3 |
S2 |
True |
In grasslands on eroded limestone or chalk and in oak scrub on rocky hillsides; Perennial; Flowering May-Sept; Fruiting June-Sept |
Comanche Peak prairie clover |
Dalea reverchonii |
Plants |
Not Listed |
Not Listed |
G2 |
S2S3 |
True |
Shallow, calcareous clay to sandy clay soils over limestone in grasslands or openings in post oak woodlands, often among sparse vegetation in barren, exposed sites, most known sites are underlain by Goodland Limestone, most known sites are on roadway right-of-ways; flowering April-June, one account for October |
Sabinal prairie clover |
Dalea sabinalis |
Plants |
Not Listed |
Not Listed |
GH |
SH |
True |
Information sketchy, but probably in rocky soils or on limestone outcrops in sparse grassland openings in juniper-oak woodlands; flowering April-May or May -June |
Guadalupe Mountains mescal bean |
Dermatophyllum guadalupense |
Plants |
Not Listed |
Not Listed |
G2 |
S1 |
False |
One-seeded juniper (Juniperus monosperma) shrublands on dry slopes above 1,500 m (4,900 ft) elevation in Guadalupe Mountains on slightly gypseous pink sandstone that occurs as lenses within the pervasive limestone of the region; flowering late March-late April or May |
net-leaf bundleflower |
Desmanthus reticulatus |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
True |
Mostly on clay prairies of the coastal plain of central and south Texas; Perennial; Flowering April-July; Fruiting April-Oct |
Lindheimer's tickseed |
Desmodium lindheimeri |
Plants |
Not Listed |
Not Listed |
G3G4 |
S1 |
False |
Known in Texas only from three locations; US habitat is uncertain; has been found along rocky bed of dry ravine and among brush on the banks, steep ravine banks, dry caliche flat roadsides, in shallow soil on outcrops; occurred in deep to partial shade and openings in live oak-juniper woodland associations on the Edwards Limestone; flowering August-October or November. |
Don Richards' spring moss |
Donrichardsia macroneuron |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
True |
Shaded limestone rocks partially submerged in rapidly flowing relatively thermally constant water at a spring complex in a short 10 m (30 ft) run between the spring source and the river. |
Standley's draba |
Draba standleyi |
Plants |
Not Listed |
Not Listed |
G2G3 |
S1 |
False |
Crevices in sparsely vegetated igneous boulders and rock outcrops at high elevations in pine-oak-juniper woodlands; flowering June-October |
lila de los Llanos |
Echeandia chandleri |
Plants |
Not Listed |
Not Listed |
G2G3 |
S2S3 |
False |
Most commonly encountered among shrubs or in grassy openings in subtropical thorn shrublands on somewhat saline clays of lomas along Gulf Coast near mouth of Rio Grande; also observed in a few upland coastal prairie remnants on clay soils over the Beaumont Formation at inland sites well to the north and along railroad right-of-ways and cemeteries; flowering (May-) September-December, fruiting October-December |
Green Island echeandia |
Echeandia texensis |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
True |
On somewhat saline clays of lomas along the Gulf Coast near the mouth of Rio Grande, a habitat shared with E. chandleri; both species grow in areas dominated by herbaceous species with scattered brush and stunted trees, or in grassy openings in subtropical thorn shrublands; flowers April, June, and November, and likely in other months, as well |
Topeka purple-coneflower |
Echinacea atrorubens |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
False |
Occurring mostly in tallgrass prairie of the southern Great Plains, in blackland prairies but also in a variety of other sites like limestone hillsides; Perennial; Flowering Apr-June |
Chisos Mountains hedgehog cactus |
Echinocereus chisosensis |
Plants |
LT |
T |
G2T1 |
S1 |
True |
Degraded desert grasslands or open shrublands on unconsolidated gravelly fan and terrace deposits on desert flats and low hills at moderate elevations of about 600-800 m (1950-2600 ft) in the Chihuahuan Desert, almost always found under the shelter of a nursery plant; flowering March-April, perhaps July, fruit maturing May-June, perhaps as late as August |
golden-spine hedgehog cactus |
Echinocereus chloranthus var. neocapillus |
Plants |
Not Listed |
Not Listed |
G4T1 |
S1 |
True |
Sparsely vegetated desert grasslands over novaculite outcrops; flowering late March-early May |
Texas claret-cup cactus |
Echinocereus coccineus var. paucispinus |
Plants |
Not Listed |
Not Listed |
G5T3 |
S3 |
False |
Mountains, hills, and mesas, igneous and limestone, oak-juniper-pinyon woodland or juniper woodland on limestone mesas, mostly rocky habitats but also in alluvial basins, grasslands, or among mesquite or other shrubs. Flowering March - April (Powell and Weedin 2004). |