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)
Eriogonum correllii Correll's wild-buckwheat Plants Yes Not Listed Not Listed G2G3 S2S3 Yes Occurs on clay mounds, caprock and rocky ledges on calcihe substrates.
Eriogonum greggii Gregg's wild-buckwheat Plants Yes Not Listed Not Listed G2 S1 No Sparingly vegetated openings in thorn shrublands in shallow soils on xeric ridges along the Rio Grande; also on excessively drained, sandy soil over caliche and calcareous sandstone of the Goliad Formation and over sandstone or fossiliferous layers of the Jackson Group; flowering February-July, probably opportunistically during the growing season
Eriogonum hemipterum var. hemipterum Chisos Mountains wild-buckwheat Plants Yes Not Listed Not Listed G3T2 S2 Yes Wooded slopes and canyons (Powell and Worthington 2018). July - September.
Eriogonum nealleyi Irion County wild-buckwheat Plants Yes Not Listed Not Listed G2 S2 Yes Grasslands and shallow stony soils over limestone and indurated caliche, often collected from ungrazed but sparsely vegetated roadsides, particularly where limestone or caliche is exposed on hilltops; flowering June-September
Eriogonum suffruticosum bushy wild-buckwheat Plants Yes Not Listed Not Listed G2 S2 Yes Sparsely vegetated rocky limestone slopes, low hills, and clay flats; also on gypseous soils; flowering March-April, in full fruit by May
Eriogonum tenellum var. ramosissimum basin wild-buckwheat Plants Yes Not Listed Not Listed G5T3 S3 Yes Usually rooted in crevices of sparsely vegetated, unshaded granite and gneiss outcrops or associated deposits of dry sand and gravel; Perennial; Flowering Apr-Dec
Erythranthe chinatiensis fringed monkeyflower Plants Yes Not Listed Not Listed G1 S1 No <span><span>Perennially wet areas near springs, on wet cliff faces at waterfalls, and in creekbeds, mostly in mountains of the Chihuahuan Desert; flowering (May-) June-August.</span></span>
Escobaria albicolumnaria white column cactus Plants Yes Not Listed Not Listed G2G3 S2S3 No Creosote bush or lechuguilla canyon shrublands primarily on nearly level terrain to rolling hills on thin, gravelly soils or limestone bedrock of the Santa Elena, Glen Rose, Boquillas, and Telephone Canyon formations; at lower elevations 550-1370 m (1800-5000 ft) in the Chihuahuan Desert; flowering early March-May
Escobaria dasyacantha var. chaffeyi Chaffey's cory cactus Plants Yes Not Listed Not Listed G3T1 S1 No Pine-oak-juniper woodlands on rocky igneous and limestone soils at 1425-2225 m (4675-7300 ft).; flowering March-June; fruiting June-September
Escobaria dasyacantha var. dasyacantha dense cory cactus Plants Yes Not Listed Not Listed G3T3 S3 No Lechuguilla-sotol or creosote bush shrublands, grasslands, and oak-juniper woodlands on gravelly, rocky, and/or loamy soils over igneous or limestone substrates at moderate elevations 750-1800 m (2450-5900 ft) in the Chihuahuan Desert; flowering March-May (-July), fruiting (May-) June-August
Escobaria dasyacantha var. duncanii Duncan's cory cactus Plants Yes Not Listed Not Listed G3T2T3 S1S2 No Chihuahuan Desert scrub at low to moderate elevations 650-1825 m (2150-6000 ft) on hills, ledges, and benches in cracks and crevices of limestone outcrops; flowering February-March (-May, or July in New Mexico), fruiting mostly May-June
Escobaria guadalupensis Guadalupe Mountains pincushion cactus Plants Yes Not Listed Not Listed G1 S1 Yes On exposed slabs and fractured limestone rock on steep, mostly south-facing slopes in pine-oak-juniper woodlands at (1370-) 1825-2650 m ([4500-] 6000-8700 ft) in the Guadalupe Mountains; flowering April-May; fruiting October-November
Escobaria hesteri Hester's cory cactus Plants Yes Not Listed Not Listed G2 S2 Yes Grasslands on novaculite hills or limestone hills and alluvial fans, also in pine-oak-juniper woodlands on igneous substrates; flowering April-early June (-November), also during growing season possibly in response to significant rainfall; fruiting June-August (-January)
Escobaria minima Nellie's cory cactus Plants Yes E
11/07/1979
E
04/29/1983
G1 S1 Yes Novaculite outcrops in full sun among Chihuahuan Desert scrub, usually in cracks or chips of novaculite or in mats of Selaginella; flowering March-June, probably most consistently from mid April - mid May; fruiting within one month or less of flowering
Escobaria sneedii var. sneedii Sneed's pincushion cactus Plants Yes E
11/07/1979
E
04/29/1983
G2G3QT2Q S2 No Xeric limestone outcrops on rocky, usually steep slopes in desert mountains, in the Chihuahuan Desert succulent shrublands or grasslands; flowering April-September (peak usually in April, sometimes opportunistically after summer rains; fruiting August - November
Euphorbia astyla alkali spurge Plants Yes Not Listed Not Listed G2 S1 No In Pecos County, locally frequent in nearly bare areas within alkali sacaton (Sporobolus airoides) grasslands on alkaline and/or saline silt loam on alluvial flats along a spring-fed desert stream; in Mexico, on windblown gypsum deposits and gypsum flats, Coahuila locally abundant; flowering and fruiting at least March-June and August-September, probably throughout the growing season depending on rainfall
Euphorbia chaetocalyx var. triligulata three-tongue spurge Plants Yes Not Listed Not Listed G5T1 S1 No In Texas, in crevices in steep limestone cliffs and on scree and colluvium below; In Coahuila, on basalt and tuff cliffs; flowering/fruiting July-October, perhaps earlier in growing season too.
Euphorbia geyeri var. wheeleriana Wheeler's spurge Plants Yes Not Listed Not Listed G5T2 S1 No Sparingly vegetated, loose eolian quartz sand on reddish sand dunes or coppice mounds; flowering and fruiting at least August-September, probably earlier and later, as well
Euphorbia golondrina swallow spurge Plants Yes Not Listed Not Listed G2 S2 No Alluvial or eolian sand along Rio Grande, occasionally on adjacent shale or limestone slopes; flowering June-November
Euphorbia innocua velvet spurge Plants Yes Not Listed Not Listed G3 S3 Yes Open or brushy areas on coastal sands and the South Texas Sand Sheet; Perennial; Flowering Sept-April; Fruiting Nov-July
Euphorbia jejuna dwarf broomspurge Plants Yes Not Listed Not Listed G2 S2 Yes According to specimen collections, found on grama-grass prairie on caliche uplands, also dry caliche slopes, and limestone hills; flowering late March through July
Euphorbia peplidion low spurge Plants Yes Not Listed Not Listed G3 S3 Yes Occurs in a variety of vernally-moist situations in a number of natural regions; Annual; Flowering Feb-April; Fruiting March-April
Euphorbia perennans perennial broomspurge Plants Yes Not Listed Not Listed G3 S3 No Occurring in sparsely vegetated low elevation sites on gypseous or calcareous substrates; Perennial; Flowering April-Oct; Fruiting Oct
Euphorbia simulans Big Bend spurge Plants Yes Not Listed Not Listed G3 S3 Yes Occurs in sparsely vegetated low elevation sites on gypseous or calcareous substrates (Carr 2015).
Euphorbia strictior tall plains spurge Plants Yes Not Listed Not Listed G3 S3 No Occurs in shortgrass grasslands on dry rocky or, more commonly, deep sandy sites; Perennial; Flowering/Fruiting June-Sept