Species of Greatest Conservation Need
1124 species
| Scientifc Name | Common Name | Taxonomic Group | SGCN Status | Federal Status | State Status | Global Rank | State Rank | Endemic | General Habitat Type(s) |
|---|---|---|---|---|---|---|---|---|---|
| Helianthus praecox ssp. praecox | Texas sunflower | Plants | Yes | Not Listed | Not Listed | G4T2 | S2 | Yes | Sandy open areas along the upper Texas coast; Annual; Flowering April-Sept |
| Hesperaloe funifera ssp. funifera | Mexican hesperaloe | Plants | Yes | Not Listed | Not Listed | G3T2T3 | S1 | No | Habitat description not available at this time. |
| Hesperaloe parviflora | red yucca | Plants | Yes | Not Listed | Not Listed | G3 | S3 | No | Shrublands on dry limestone slopes; Perennial; Flowering April-May; Fruiting May-June |
| Heteranthera mexicana | Mexican mud-plantain | Plants | Yes | Not Listed | Not Listed | G2G3 | S1 | No | Wet clayey soils of resacas and ephemeral wetlands in South Texas and along margins of playas in the Panhandle; flowering June-December, only after sufficient rainfall |
| Hexalectris nitida | Glass Mountains coral-root | Plants | Yes | Not Listed | Not Listed | G3 | S3 | No | Apparently rare in mixed woodlands in canyons in the mountains of the Brewster County, but encountered with regularity, albeit in small numbers, under Juniperus ashei in woodlands over limestone on the Edwards Plateau, Callahan Divide and Lampasas Cutplain; Perennial; Flowering June-Sept; Fruiting July-Sept |
| Hexalectris revoluta | Chisos coral-root | Plants | Yes | Not Listed | Not Listed | G2T1T2 | S1 | Yes | In the Chisos and Guadalupe mountains, in humus in oak groves along rocky creekbeds at mid- to high elevations; in the Glass Mountains, it has been found 'among lechuguilla and shinnery oak on the sunny slopes and ridges'; purplish or brownish stem color provides a surprisingly effective camouflage from human observers, aerial stems are not reliably sent up every year; usually flowering May-August. |
| Hexalectris warnockii | Warnock's coral-root | Plants | Yes | Not Listed | Not Listed | G2G3 | S2 | No | In leaf litter and humus in oak-juniper woodlands on shaded slopes and intermittent, rocky creekbeds in canyons; in the Trans Pecos in oak-pinyon-juniper woodlands in higher mesic canyons (to 2000 m [6550 ft]), primarily on igneous substrates; in Terrell County under Quercus fusiformis mottes on terrraces of spring-fed perennial streams, draining an otherwise rather xeric limestone landscape; on the Callahan Divide (Taylor County), the White Rock Escarpment (Dallas County), and the Edwards Plateau in oak-juniper woodlands on limestone slopes; in Gillespie County on igneous substrates of the Llano Uplift; flowering June-September; individual plants do not usually bloom in successive years |
| Hibiscus dasycalyx | Neches River rose-mallow | Plants | Yes | T 10/11/2013 |
T 07/02/2017 |
G1 | S1 | Yes | Open marshy habitats in seasonally wet alluvial soils, most often near standing rather than flowing water; flowering June-August |
| Hoffmannseggia drummondii | Drummond's rushpea | Plants | Yes | Not Listed | Not Listed | G3 | S3 | No | Open areas on sandy clay; Perennial |
| Hoffmannseggia tenella | slender rush-pea | Plants | Yes | E 11/01/1985 |
E 01/09/1987 |
G1 | S1 | Yes | Coastal prairie grasslands on level uplands and on gentle slopes along drainages, usually in areas of shorter or sparse vegetation; soils often described as Blackland clay, but at some of these sites soils are coarser textured and lighter in color than the typical heavy clay of the coastal prairies; flowering April-November |
| Houstonia correllii | Correll's bluet | Plants | Yes | Not Listed | Not Listed | G1 | S1 | Yes | Sandy soils in grasslands with scattered shrubs or in mesquite savannas; does not occur in disturbed sandy areas or in improved pastures; flowering March, other months unknown |
| Houstonia croftiae | Croft's bluet | Plants | Yes | Not Listed | Not Listed | G3 | S3 | Yes | Occurs in sparsely vegetated areas in grasslands or among shrubs (Carr 2015). |
| Houstonia parviflora | Greenman's bluet | Plants | Yes | Not Listed | Not Listed | G3 | S3 | Yes | Grass pastures. Feb- Apr. (Correll and Johnston 1970). |
| Hymenopappus biennis | biennial woolywhite | Plants | Yes | Not Listed | Not Listed | G3G4 | S2 | No | Grasslands and open pine-juniper-oak woodlands on rocky, calcareous soils above 1,800 m (5,900 ft); flowering July-October |
| Hymenopappus carrizoanus | sandhill woolywhite | Plants | Yes | Not Listed | Not Listed | G2 | S2 | Yes | Disturbed or open areas in grasslands and post oak woodlands on deep sands derived from the Carrizo Sand and similar Eocene formations; flowering April-June |
| Hymenoxys perpygmaea | pygmy prairie dawn | Plants | Yes | Not Listed | Not Listed | G1 | S1 | Yes | Occurs in saline slick depressions on an alfisol prairie (Mink et al. 2012). The area is characterized by the presence of mima mounds (Mink et al. 2012). The prairie is classified as an alfisol Sporobolus silveanus (Swallen)�Carex meadii (Dewey) Herbaceous Prairie Association with mima mounds (NatureServe, 2010). The characteristic species of the slicks are ephemerals, short-lived annuals, or drought-tolerant specialists (Mink et al. 2012). |
| Hymenoxys texana | Texas prairie dawn | Plants | Yes | E 03/13/1986 |
E 01/09/1987 |
G2 | S2 | Yes | In poorly drained, sparsely vegtated areas (slick spots) at the base of mima mounds in open grassland or almost barren areas on slightly saline soils that are sticky when wet and powdery when dry; flowering late February-early April |
| Hymenoxys vaseyi | Vasey's bitterweed | Plants | Yes | Not Listed | Not Listed | G2 | S1 | No | Occurs on xeric limestone cliffs and slopes at mid- to high elevations in desert shrublands. |
| Ipomoea shumardiana | Shumard's morning glory | Plants | Yes | Not Listed | Not Listed | G2G3 | S1 | No | Known only from two specimens, both collected in 1941 from one site along the Red River, gravelly roadside prairie; Perennial; Flowering June-Aug; Fruiting July |
| Ipomopsis havardii | Havard's standing cypress | Plants | Yes | Not Listed | Not Listed | G3 | S3 | No | Various open habitats at lower elevations in and near the mountains of Brewster, Hudspeth and Presidio counties; Perennial; Flowering Feb-Sept; Fruiting Feb-March |
| Isoetes lithophila | rock quillwort | Plants | Yes | Not Listed | T 03/30/2020 |
G1 | S1 | Yes | Rooted in sand and gravel under shallow water of seasonal pools (vernal pools) that develop during rainy seasons in small, shallow, unshaded basins on barren outcrops of granite and gneiss; sporulating in late winter and spring, and opportunistically in other seasons following heavy rainfall |
| Justicia runyonii | Runyon's water-willow | Plants | Yes | Not Listed | Not Listed | G3 | S2 | No | Margins of and openings within subtropical woodlands or thorn shrublands on calcareous, alluvial, silty or clayey soils derived from Holocene silt and sand floodplain deposits of the Rio Grande Delta; can be common in narow openings such as those provided by trails through dense ebony woodlands and is sometimes restricted to microdepressions; flowering (July-) September-November |
| Justicia warnockii | Warnock's water-willow | Plants | Yes | Not Listed | Not Listed | G3 | S3 | No | Occurs mostly on xeric limestone uplands and rock outcrops; Perennial; Flowering May-Dec; Fruiting June |
| Justicia wrightii | Wright's water-willow | Plants | Yes | Not Listed | Not Listed | G2 | S1S2 | Yes | Shortgrass grasslands and/or shrublands; dry gravelly clay soils over limestone on flats and low hills at elevations of 900-1500 m (2950-4900 ft); flowering April-August, or perhaps after periods of sufficient rainfall |
| Kallstroemia perennans | perennial caltrop | Plants | Yes | Not Listed | Not Listed | G1 | S1 | Yes | Somewhat barren gypseous clays or limestone soils at low elevations in the Chihuahuan Desert; flowering late spring-early fall |