Species of Greatest Conservation Need

**Species of Greatest Conservation Need** (Updated: 06/16/2025)
Scientifc Name	Common Name	Taxonomic Group	SGCN Status	Federal Status	State Status	Global Rank	State Rank	Endemic	General Habitat Type(s)
Abronia ameliae	Amelia's sand-verbena	Plants	Yes	Not Listed	Not Listed	G3	S3	Yes	Endemic to South Texas; Occurs on deep, well-drained sandy soils of the South Texas Sand Sheet in grassy and/or herbaceous dominated openings within coastal live oak woodlands or mesquite-coastal live oak woodlands. Perennial; Flowering Mar-June
Abronia macrocarpa	large-fruited sand-verbena	Plants	Yes	E 09/28/1988	E 12/30/1988	G2?	S2?	Yes	Restricted to sparse herbaceous vegetation in deep, somewhat excessively drained sands in openings in Post oak woodlands, sometimes in active blowouts; all known sites underlain by sandy Eocene strata; Perennial; Flowering late February-May (-June; also in the fall following periods of high rainfall)
Achnatherum curvifolium	Guadalupe needlegrass	Plants	Yes	Not Listed	Not Listed	G3	S2	No	Usually in rocky limestone areas in the Guadalupe, Delaware, and Dead Horse Mountains (Carr 2015).
Acleisanthes acutifolia	Havard trumpets	Plants	Yes	Not Listed	Not Listed	G3	S1	No	In xeric limestone or gypseous habitats; Perennial; Flowering July-Sept
Acleisanthes crassifolia	Texas trumpets	Plants	Yes	Not Listed	Not Listed	G2	S2	No	Shallow, well-drained, calcareous, gravelly loams over caliche on gentle to moderate slopes, often in sparsely vegetated openings in cenizo (Leucophyllum frutescens) shrublands; known populations occur on Austin Chalk (Cretaceous) or Uvalde Gravel (Pleistocene); Perennial; Flowering March-November; Fruiting April-December
Acleisanthes parvifolia	littleleaf moonpod	Plants	Yes	Not Listed	Not Listed	G3	S3	No	Found on xeric clay or shale exposures; Perennial; Flowering April-Sept; Fruiting June-Sept
Acleisanthes wrightii	Wright's trumpets	Plants	Yes	Not Listed	Not Listed	G2	S2	No	Open semi-desert grasslands and shrublands on shallow stony soils over limestone on low hills and flats; Perennial; Flowering spring-fall, probably also in response to rains
Adelia vaseyi	Vasey's adelia	Plants	Yes	Not Listed	Not Listed	G3	S3	No	Mostly subtropical evergreen/deciduous woodlands on loamy soils of Rio Grande Delta, but occassionally in shrublands on more xeric sandy to gravelly upland sites; Perennial; Flowering January-June
Agalinis auriculata	earleaf false foxglove	Plants	Yes	Not Listed	Not Listed	G3	SH	No	Known in Texas from one late nineteenth century specimen record labeled -Benbrook-; in Oklahoma, degraded prairies, floodplains, fallow fields, and borders of upland sterile woods; in Arkansas, blackland prairie; Annual; Flowering August - October
Agalinis calycina	Leoncita false-foxglove	Plants	Yes	Not Listed	T 03/30/2020	G1	S1	No	Grasslands on perennially moist, heavy, alkaline/saline, calcareous silty clays and loams in and around cienegas (desert springs) and seeps; Annual; Flowering September-October
Agalinis densiflora	Osage Plains false foxglove	Plants	Yes	Not Listed	Not Listed	G3	S2	No	Most records are from grasslands on shallow, gravelly, well drained, calcareous soils; Prairies, dry limestone soils; Annual; Flowering Aug-Oct
Agalinis navasotensis	Navasota false foxglove	Plants	Yes	Not Listed	Not Listed	G1	S1	Yes	Relatively sparsely vegetated, shallow, sandy soils on calcareous sandstone outcrops of the Oakville Formation, with associated surrounding species more typical of Edwards Plateau, than Post Oak Savanna or Blackland Prairie; also, Catahoula Formation barrens in pine savanna; Annual; Flowering September-October
Agrimonia incisa	incised groovebur	Plants	Yes	Not Listed	Not Listed	G3G4	S3	No	Sandy soils in dry to mesic pine or mixed pine-oak forests and forest borders; usually in fire-maintained longleaf pine savannas but also in more mesic habitats; Perennial; Flowering July-September
Allium canadense var. ecristatum	crestless onion	Plants	Yes	Not Listed	Not Listed	G5T3	S3	Yes	Occurs on poorly drained sites on sandy substrates within coastal prairies of the Coastal Bend area (Carr 2015).
Allium elmendorfii	Elmendorf's onion	Plants	Yes	Not Listed	Not Listed	G2	S2	Yes	Grassland openings in oak woodlands on deep, loose, well-drained sands; in Coastal Bend, on Pleistocene barrier island ridges and Holocene Sand Sheet that support live oak woodlands; to the north it occurs in post oak-black hickory-live oak woodlands over Queen City and similar Eocene formations; one anomalous specimen found on Llano Uplift in wet pockets of granitic loam; Perennial; Flowering March-April, May
Allolepis texana	Texas false saltgrass	Plants	Yes	Not Listed	Not Listed	G2	S1	No	Sandy to silty soils of valley bottoms and river floodplains, not generally on alkaline or saline sites; Perennial; Flowering (May-) July-October depending on rainfall
Ambrosia cheiranthifolia	South Texas ambrosia	Plants	Yes	E 08/24/1994	E 01/30/1997	G1	S1	No	Grasslands and mesquite-dominated shrublands on various soils ranging from heavy clays to lighter textured sandy loams, mostly over the Beaumont Formation on the Coastal Plain; in modified unplowed sites such as railroad and highyway right-of-ways, cemeteries, mowed fields, erosional areas along small creeks; Perennial; Flowering July-November
Ammannia grayi	longstalk heimia	Plants	Yes	Not Listed	Not Listed	G2G3	S2	No	Moist or subirrigated alkaline or gypsiferous clayey soils along unshaded margins of cienegas and other wetlands; occurs sparingly on an alkaline, somewhat saline silt loam on terraces of spring-fed streams in grassland; also occurs common in moderately alkaline clay along perennial stream and in subirrigated wetlands atop poorly-defined spring system; also occurs in low, wetland area along highway right-of-way; flowering May-September
Amorpha laevigata	smooth indigobush	Plants	Yes	Not Listed	Not Listed	G3?	S1	No	Prairies, open woods and creek banks; Perennial; Flowering May-July
Amorpha paniculata	panicled indigobush	Plants	Yes	Not Listed	Not Listed	G3	S3	No	A stout shrub, 3 m (9 ft) tall that grows in acid seep forests, peat bogs, wet floodplain forests, and seasonal wetlands on the edge of Saline Prairies in East Texas. It is distinguished from other Amorpha species by its fuzzy leaflets with prominent raised veins underneath, and the flower panicles, which are 8 to 16 inches long and slender, held above the foliage. Perennial; Flowering May-August.
Amorpha roemeriana	Texas amorpha	Plants	Yes	Not Listed	Not Listed	G3	S3	No	Juniper-oak woodlands or shrublands on rocky limestone slopes, sometimes on dry shelves above creeks; Perennial; Flowering May-June; Fruiting June-Oct
Amsonia tharpii	Tharp's blue-star	Plants	Yes	Not Listed	Not Listed	G1	S1	No	Open areas in midgrass grasslands or shrublands in shallow clay soils over limestone; Bedrock at Pecos County site is mapped as Cretaeous limestone and marl of Washita Group; soils very shallow, well-drained calcareous moderately alkaline, light brownish-gray stony loam of Lozier-Rock outcrop, developed over fractured caliche-coated limestone; New Mexico site differs; Perennial; Flowering April-early May
Anulocaulis leiosolenus var. lasianthus	Chihuahuan ringstem	Plants	Yes	Not Listed	Not Listed	G4T2	S2	No	Xeric gypseous clay or limestone outcrops and flats; Perennial; Flowering/Fruiting Sept
Anulocaulis reflexus	Ojinaga ringstem	Plants	Yes	Not Listed	Not Listed	G2	S1	No	Primarily located on shaley gypseous clays at 800 - 1200 m (2600-4000 ft); Perennial; Flowering mid-May - mid-October
Aquilegia chaplinei	Guadalupe Mountains columbine	Plants	Yes	Not Listed	Not Listed	G2	S2	No	Perennially moist to wet limestone canyon walls; moist leaf litter and humus among boulders in wooded mesic canyons; Perennial; Flowering April-November (most reliably June-July)