Species of Greatest Conservation Need

1124 species
Taxonomic Group
Federal Status
State Status
Endemic

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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)
Lachnocaulon digynum tiny bog button Plants Yes Not Listed Not Listed G3G4 S1 No Wet, acid, exposed sands, sphagnum mats, and sandstone of hillside seepage bogs (hanging bogs); appears restricted to the Catahoula formation in Texas; usually among low growing graminoids; flowering and fruiting August-October
Laennecia turnerorum Turner's horseweed Plants Yes Not Listed Not Listed G1 S1 Yes Occurs on silty limestone-derived soils in Chihuahuan Desert shrubland in basins sourrounded by desert mountains.
Leavenworthia texana Texas golden gladecress Plants Yes E
10/11/2013
E
03/20/2015
G1 S1 Yes Edaphically influenced herbaceous communities on shallow calcareous soils in vernally moist to wet glades on glauconite or ironstone outcrops of the Weches Formation; flowering or fruiting late February to April or May
Lechea mensalis Chisos pinweed Plants Yes Not Listed Not Listed G1 S1 No Open oak-pinyon-juniper woodlands over igneous or sandstone rock outcrops at high elevations in the mountains of the Trans Pecos and adjacent New Mexico; in Mexico, gravelly soil over igneous rocks and on alternating limestone and rhyolite substrates; presumably flowering June-August
Leitneria pilosa ssp. pilosa corkwood Plants Yes Not Listed Not Listed G2G3T2 S2 No Wet or saturated silty soils along brackish or freshwater swamps and ponds and other low, poorly drained sites; flowers in early spring, fruiting as early as May
Lenophyllum texanum Texas stonecrop Plants Yes Not Listed Not Listed G3 S3 No Found in shrublands on clay dunes (lomas) at the mouth of the Rio Grande and on xeric calcareous rock outcrops at scattered inland sites; Perennial; Flowering/Fruiting Nov-Feb
Lepidospartum burgessii gypsum scalebroom Plants Yes Not Listed T
03/30/2020
G1 S1 No Gypsum dune system in the salt basin west of the Guadalupe Mountains, east of Dell City; sparsely vegetated areas; some plants on and around shifting, unstabilized dunes; others in stabilized gypseous soils with a well-developed microbiotic crust; flowering late April- early October, peaking late July-early September
Leucosyris blepharophylla gypsum hotspring aster Plants Yes Not Listed Not Listed G1 S1 No Located at perennial springs, seeps, and their drainages in sandstone, calcareous, or gypseous canyons; Perennial; Flowering summer and fall
Leucosyris mattturneri Matt Turner's aster Plants Yes Not Listed Not Listed G1 S1 Yes In gypseous or sandy soils along shallow, perennial seeps and streams within canyons in the Chihuahuan Desert; Annual or short-lived perennial; Flowering April - September
Liatris bracteata coastal gay-feather Plants Yes Not Listed Not Listed G2G3 S2S3 Yes Coastal prairie grasslands of various types, from salty prairie on low- lying somewhat saline clay loams to upland prairie on nonsaline clayey to sandy loams; flowering in fall
Liatris cymosa branched gay-feather Plants Yes Not Listed Not Listed G2 S2 Yes Somewhat barren grassland openings in post oak woodlands on tight clayey, chalky, or gravelly soils, often over Catahoula Formation; flowering July-October
Liatris glandulosa glandular gay-feather Plants Yes Not Listed Not Listed G2 S2 Yes Occurs in herbaceous vegetation on limestone outcrops (Carr 2015). Flowering: July-Oct.
Liatris tenuis slender gay-feather Plants Yes Not Listed Not Listed G3 S3 No Sandy soils of fire-maintained upland longleaf pine savannas, mostly over the Catahoula Formation; flowering June-September
Lycium puberulum var. berberioides silvery wolfberry Plants Yes Not Listed Not Listed G4T3 S3 Yes Occurs in Chihuahuan Desert grasslands and shrublands on gravel and clay hills and in creosote shrublands on gravel flats; Perennial; Flowering March-June; Fruiting April
Lycium texanum Texas wolf-berry Plants Yes Not Listed Not Listed G2 S2 No Semi-desert grasslands and thorn shrublands on sandy, gravelly, and/or loamy soils, on very gently sloping terrain as well as in rocky areas of canyons, often over limestone at moderate elevations; flowering March-October
Lythrum ovalifolium Plateau loosestrife Plants Yes Not Listed Not Listed G3G4 S3S4 No Banks and gravelly beds of perennial (or strong intermittent) streams on the Edwards Plateau, Llano Uplift and Lampasas Cutplain; Perennial; Flowering/Fruiting April-Nov
Malaxis wendtii Wendt's malaxis Plants Yes Not Listed Not Listed G1G2 S1 No In Texas, oak-juniper-pinyon woodlands in moist canyons and on north-facing slopes in the Chisos Mountains; flowering July-September
Mammillaria wrightii var. wrightii Wright's fishhook cactus Plants Yes Not Listed Not Listed G4T3 SH No Franklin Mountains (Carr 2015)
Manfreda longiflora St. Joseph's staff Plants Yes Not Listed Not Listed G2 S2 No Thorn shrublands on clays and loams with various concentrations of salt, caliche, sand, and gravel; rossettes are often obscured by low shrubs; flowering September-October
Manfreda sileri Siler's huaco Plants Yes Not Listed Not Listed G3 S3 No Rare in a variety of grasslands and shrublands on dry sites; Perennial; Flowering April-July; Fruiting June-July
Manihot walkerae Walker's manioc Plants Yes E
10/02/1991
E
03/30/1993
G2 S1 No Periphery of native brush in sandy loam; also on caliche cuestas?; flowering April-September (following rains?)
Matelea atrostellata black corona milkvine Plants Yes Not Listed Not Listed G1? S1 Yes Occurs on rocky soils in mountain canyons in oak-junper-pinyon woodlands.
Matelea brevicoronata shortcrown milkvine Plants Yes Not Listed Not Listed G3 S3 Yes Primarily in grasslands on tight sandy or silty substrates; Perennial; Flowering March-Sept; Fruiting May-Sept
Matelea edwardsensis plateau milkvine Plants Yes Not Listed Not Listed G3 S3 Yes Occurs in various types of juniper-oak and oak-juniper woodlands; Perennial; Flowering March-Oct; Fruiting May-June
Matelea radiata Falfurrias milkvine Plants Yes Not Listed Not Listed G1 S1 Yes Uncertain, only two known specimens; one from clay soil on dry gravel hills at altitude of approximately 45 m (150 ft); other from Falfurrias, no habitat description; probably flowering May-June