Species of Greatest Conservation Need

1279 species
Taxonomic Group
Federal Status
State Status
Endemic

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Species of Greatest Conservation Need (Updated: 01/31/2024)
Common Name Scientifc Name Taxonomic Group Federal Status State Status Global Rank State Rank Endemic General Habitat Type(s)
desert night-blooming cereus Peniocereus greggii var. greggii Plants Not Listed Not Listed G3G4T3 S2 False Chihuahuan Desert shrublands or shrub invaded grasslands in alluvial or gravelly soils at lower elevations, 1200-1500 m (3900-4900 ft), on slopes, benches, arroyos, flats, and washes; flowering synchronized over a few nights in early May to late June when almost all mature plants bloom, flowers last only one day and open just after dark, may flower as early as April
Alamo beardtongue Penstemon alamosensis Plants Not Listed Not Listed G3 S1 False Rocky soils derived from limestone (in Texas), usually in sheltered sites, often on north facing slopes and in mesic canyon bottoms, occasionally in rock crevices or among unbrowsed shrubs; flowering late April-June
royal red penstemon Penstemon cardinalis var. regalis Plants Not Listed Not Listed G3T2T3 S2 False Pine-oak woodlands in canyons at higher elevations in the Davis and Guadalupe mountains; flowering May-June (-August)
Guadalupe beardtongue Penstemon guadalupensis Plants Not Listed Not Listed G3 S3 True Scattered in calcareous prairies on the Lampasas Cutplain and Edwards Plateau; Perennial; Flowering/Fruiting March-July
threeflower penstemon Penstemon triflorus ssp. triflorus Plants Not Listed Not Listed G3T3 S3 True Occurs sparingly on rock outcrops and in grasslands associated with juniper-oak woodlands (Carr 2015).
Heller's beardtongue Penstemon triflorus var. integrifolius Plants Not Listed Not Listed G3T2 S2 True Occurs sparingly on rock outcrops and in grasslands associated with juniper-oak woodlands (Carr 2015).
Wright's beardtongue Penstemon wrightii Plants Not Listed Not Listed G3G4 S3 False Occurs mostly in montane grasslands and woodlands; Perennial; Flowering April-Aug; Fruiting May-Aug
manystem spiderflower Peritoma multicaulis Plants Not Listed Not Listed G2G3 S1 False Wet, saline or alkaline sandy soils around alkali sinks or flats, saline playas, springs, or meadows; in Texas, known from a wet, grassy seep along sandstone cliffs and historically from a Big sacaton (Sporobulus wrightii) flat at the edge of a cienega (desert spring) in soil developed over volcanic ash; flowering/fruiting June-September
limestone rock-daisy Perityle aglossa Plants Not Listed Not Listed G3G4 S3 False Crevices in limestone outcrops along the Rio Grande in Brewster and Terrell counties; Perennial; Flowering July-Dec; Fruiting Oct-Nov
rayless rock-daisy Perityle angustifolia Plants Not Listed Not Listed G3G4 S3S4 True Crevices of limestone bluffs and cliff-faces; Perennial; Flowering April-Oct; Fruiting April-Sept
apressed two-bristle rock-daisy Perityle bisetosa var. appressa Plants Not Listed Not Listed G2T2 S2 False Crevices in limestone exposures on bluffs and other rock outcrops; flowering May-September
two-bristle rock-daisy Perityle bisetosa var. bisetosa Plants Not Listed Not Listed G2T2 S2 False Crevices in limestone exposures on bluffs and other rock outcrops; flowering late summer-fall
stairstep two-bristle rock-daisy Perityle bisetosa var. scalaris Plants Not Listed Not Listed G2T1 S1 True Crevices in limestone exposures on bluffs and other rock outcrops; flowering May-October
grayleaf rock-daisy Perityle cinerea Plants Not Listed Not Listed G2 S2 True Crevices in dry limestone caprock of mesas; flowering spring-fall
slimlobe rock-daisy Perityle dissecta Plants Not Listed Not Listed G2 S2 False Limestone cliff faces in desert canyons; flowering/fruiting spring-fall
Foster's rock-daisy Perityle fosteri Plants Not Listed Not Listed G1 S1 True Known only from rock faces on limestone boulders and bluffs in a deep, protected canyon; flowering/fruiting July, other months not yet known
Hueco rock-daisy Perityle huecoensis Plants Not Listed Not Listed G1 S1 False North-facing or otherwise mostly shaded limestone cliff faces within relatively mesic canyon system; flowering spring-fall
Devils River rock-daisy Perityle lindheimeri var. halimifolia Plants Not Listed Not Listed G4T3Q S3 True Limestone cliff-faces in Val Verde County eastward to central Texas; Perennial; Flowering April-Sept; Fruiting June-Aug
whiteflower leafy rock-daisy Perityle rupestris var. albiflora Plants Not Listed Not Listed G4T3 S3 True Locally common on igneous rock outcrops; Perennial; Flowering May-Oct; Fruiting Sept
leafy rock-daisy Perityle rupestris var. rupestris Plants Not Listed Not Listed G4T3 S3 True Igneous rock outcrops; Perennial; Flowering May-Nov; Fruiting June-Sept
Glass Mountains rock-daisy Perityle vitreomontana Plants Not Listed Not Listed G1 S1 True Crevices and solution pockets in Capitan Limestone exposures on cliffs and rock outcrops in the Glass Mountains; flowering June-October
Warnock's rock-daisy Perityle warnockii Plants Not Listed Not Listed G1 S1 True Crevices and solution pits in steep, dry, inaccessible limestone bluffs; flowering spring-fall
stalk-leaf phacelia Phacelia petiolata Plants Not Listed Not Listed G2 S1 False Desert scrub (gypseous substrate)
canyon bean Phaseolus texensis Plants Not Listed Not Listed G2 S2 True Narrowly endemic to rocky canyons in eastern and southern Edwards Plateau occurring on limestone soils in mixed woodlands, on limestone cliffs and outcrops, frequently along creeks. Flowering: May-Oct.
canyon mock-orange Philadelphus texensis var. ernestii Plants Not Listed Not Listed G3T3 S3 False Usually found growing from honeycomb pits on outcrops of Cretaceous limestone exposed as rimrock along mesic canyons, usually in the shade of mixed evergreen-deciduous canyon woodland; flowering April-June, fruit dehiscing September-October