Parks' jointweed |
Polygonella parksii |
Plants |
Not Listed |
Not Listed |
G2 |
S2 |
True |
Mostly found on deep, loose, whitish sand blowouts (unstable, deep, xeric, sandhill barrens) in Post Oak Savanna landscapes over the Carrizo and Sparta formations; also occurs in early successional grasslands, along right-of-ways, and on mechanically disturbed areas; flowering June-late October or September-November |
stinking rushpea |
Pomaria austrotexana |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
False |
In open areas on deep well drained sands; Perennial; Flowering Feb-Oct; Fruiting April-Oct |
broadpod rushpea |
Pomaria brachycarpa |
Plants |
Not Listed |
Not Listed |
G2 |
S2 |
True |
Grasslands, live oak savannas, and open mesquite woodlands on shallow, stony, clay soils over limestone; most specimens are from ungrazed roadsides, often in shallowest soils on landscape where competition from taller perennial grasses is minimal; flowering April-July, possibly also in November |
Little Aguja pondweed |
Potamogeton clystocarpus |
Plants |
LE |
E |
G1 |
S1 |
True |
Submersed in still or slowly flowing water of pools in intermittent creeks and rooted in sand and gravel derived from igneous rock of surrounding mountain slopes; fruiting May-October, and possibly later |
barbed rattlesnake-root |
Prenanthes barbata |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
False |
In east Texas occurs on calciphilc hardwood terraces above floodplains, and seepage slopes, often in the company of a comparatively rich herbaceous flora; elsewhere found on prairies, barrens, and open woodlands; in calcareous substrates and in sand over clay on the Weches, Fleming, and Lissie formations; flowering August-November |
canyon rattlesnake-root |
Prenanthes carrii |
Plants |
Not Listed |
Not Listed |
G2 |
S2 |
True |
Rich humus soils over limestone in upper woodland canyon drainages, upper small spring fed drainages, typically near springs in deep soils around the springs and on limestone shelves, honeycomb rock (porous rock); flowering and fruiting late August-November |
dune unicorn-plant |
Proboscidea sabulosa |
Plants |
Not Listed |
Not Listed |
G3 |
S2 |
False |
Deep, dry to seasonally moist loose sands on sparsely vegetated, unstabilized dunes and in openings in shinneries; in New Mexico, one location found as a secondary successional species in fallow fields; does not germinate in years with inadequate summer rainfall, but may be locally abundant during unusually wet summers; flowering July-August, with fruits maturing in fall |
many-flowered unicorn-plant |
Proboscidea spicata |
Plants |
Not Listed |
Not Listed |
GH |
S1 |
False |
Dry sandy alluvial and/or Eolian soils on terraces along Rio Grande or in other disturbed sandy habitats; flowering May-June (-August) |
Havard plum |
Prunus havardii |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
False |
Local in limestone canyons, on igneous talus slopes and novaculite outcrops; Perennial; Flowering March-July; Fruiting June-Oct |
Texas almond |
Prunus minutiflora |
Plants |
Not Listed |
Not Listed |
G3G4 |
S3S4 |
True |
Wide-ranging but scarce, in a variety of grassland and shrubland situations, mostly on calcareous soils underlain by limestone but occasionally in sandier neutral soils underlain by granite; Perennial; Flowering Feb-May and Oct; Fruiting Feb-Sept |
Texas peachbush |
Prunus texana |
Plants |
Not Listed |
Not Listed |
G3G4 |
S3S4 |
True |
Occurs at scattered sites in various well drained sandy situations; deep sand, plains and sand hills, grasslands, oak woods, 0-200 m elevation; Perennial; Flowering Feb-Mar; Fruiting Apr-Jun |
cienega false clappia-bush |
Pseudoclappia arenaria |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
False |
Mostly in alkali sacaton (Sporobolus airoides) grasslands on alkaline, gypseous or saline soils of alluvial flats around cienegas, playa lakes and other desert wetlands; Perennial; Flowering spring-summer |
Watson's false clappia-bush |
Pseudoclappia watsonii |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
True |
Chihuahuan Desert shrublands on dry, rocky, gypseous clay hills and arroyos; flowering May-August |
long-ray pseudocymopterus |
Pseudocymopterus longiradiatus |
Plants |
Not Listed |
Not Listed |
G4? |
S3 |
False |
Various mountain ranges in Brewster, Culberson and Jeff Davis counties; in shady, damp, sandy or rocky places in canyons in the mountains of the Trans Pecos; Perennial |
Arizona cudweed |
Pseudognaphalium arizonicum |
Plants |
Not Listed |
Not Listed |
G3G4 |
S3 |
False |
Along or near springs and creeks in oak and pine woodlands at high elevations (known locations are at 6500-7500 ft) (Nesom 2000). Aug-Oct. |
South Texas false cudweed |
Pseudognaphalium austrotexanum |
Plants |
Not Listed |
Not Listed |
G3 |
S3 |
False |
In sandy grasslands on eroded area above saline flats; along edge of sendero through mesquite woodland and shrub mottes on sandy loam; on gravel and silt bars and flats in scour plain of streams (TEX-LL specimens Carr 23682, 29264, 22647, 27206). Oct-Jan, sometimes in spring. |
Welder machaeranthera |
Psilactis heterocarpa |
Plants |
Not Listed |
Not Listed |
G2G3 |
S2S3 |
True |
Grasslands , varying from midgrass coastal prairies, and open mesquite-huisache woodlands on nearly level, gray to dark gray clayey to silty soils; known locations mapped on Victoria clay, Edroy clay, Dacosta sandy clay loam over Beaumont and Lissie formations; flowering September-November |
Arkansas oak |
Quercus arkansana |
Plants |
Not Listed |
Not Listed |
G3 |
S1 |
False |
At the Cass County location, it occurs with Quercus stellata, Q. marilandica and Q. incana in a young pine plantation on deep sandy soils; Perennial; Flowering spring |
Boynton's oak |
Quercus boyntonii |
Plants |
Not Listed |
Not Listed |
G1 |
SH |
False |
Loblolly pine-oak forests on deep, sandy soils in creek bottoms; possibly also in shallower soils of upland prairies; flowering in the spring |
Sierra del Carmen oak |
Quercus carmenensis |
Plants |
Not Listed |
Not Listed |
G2? |
S1 |
False |
Shrublands and woodlands on talus slopes at 2,200-2,500 m (7,200-8,200 ft) elevation; immature fruit collected in July |
Mexican dwarf oak |
Quercus depressipes |
Plants |
Not Listed |
Not Listed |
G3 |
S1 |
False |
Thin mountain soils on rocky slopes in grasslands, chaparral, and open woodlands at 2,100-2,600 m (6,900-8,500 ft) elevation; known in Texas from west and northwest facing slopes of Mount Livermore; flowering in the spring |
Chisos oak |
Quercus graciliformis |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
True |
Oak woodlands in dry rocky canyons, usually associated with a high water table; in moister portions of canyons of the Chisos Mountains, above elevations of 1650 m (5400 ft); flowering in the spring, fruiting July-early September |
Hinckley's oak |
Quercus hinckleyi |
Plants |
LT |
T |
G2 |
S2 |
False |
Creosote bush-mariola or lechuguilla-sotol shrublands on arid limestone slopes at mid-elevations in Chihuahuan Desert; flowering in spring, produces acorns late August-early September |
robust oak |
Quercus robusta |
Plants |
Not Listed |
Not Listed |
G1Q |
S1 |
True |
Mixed evergreen-deciduous woodlands in moist canyon bottoms at elevations ca. 1,280 m (4,200 ft) in foothills of the Chisos Mountains; flowering in th spring |
lateleaf oak |
Quercus tardifolia |
Plants |
Not Listed |
Not Listed |
G1 |
S1 |
False |
Mixed evergreen-deciduous woodlands in moist canyon bottoms at elevation ca. 2,150 m (7,050 ft) in the Chisos Mountains; flowering in the spring |