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Arctomecon humilis Dwarf (or Low) bearclaw poppy Federally listed species since 1979 Lives only in Washington County, Utah Poppy family Primary threats: Urban expansion (residential and commercial development, highway projects completed and proposed leading to direct habitat loss, loss of pollinators and habitat fragmentation) and off road vehicles Recent/impending impacts: Sun River expansion destroyed plants/habitat in May 2004, Atkinville interchange, Southern Corridor, further Sun River expansion, SITLA actions on White Dome and particularly the road that SITLA plans to build directly through its habitat destroying more plants and fragmenting its habitat further, massive residential development in or near almost of its remaining range, significant ongoing damage by OHV's Learn more about the conservation history of this species
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Astragalus ampullarioides Shivwits (or Shem) milkvetch Federally listed species since 2001 Lives only in Washington County, Utah Pea family Primary threats: Urban expansion (see above) and invasive species |
Astragalus ampullarioides |
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Astragalus holmgreniorum Holmgren's (or Paradox) milkvetch Federally listed species since 2001 Lives primarily in Washington County, Utah (a few plants occur just barely over the UT-AZ border) Pea family Primary threats: Urban expansion (see above), off road vehicles and invasive species Impending impacts: Atkinville interchange, Southern Corridor, Sun River expansion, massive residential and other development planned by SITLA in its largest extant population This plant species may currently be the most endangered of becoming extinct in Utah. |
Astragalus holmgreniorum |
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Pediocactus sileri Siler (or Gypsum) cactus Federally listed species since 1979 (reclassified in 1993) Lives only in Washington and Kane Cos. in Utah (also occurs in northwestern Arizona) Cactus family Primary threats: Urban expansion, off road vehicle use, cattle grazing, cactus poaching and gypsum mining Impending impacts: Southern Corridor, SITLA actions on White Dome, motorcyle/ATV events Very slow growing and very prone to impacts; juvenile plants seem to be missing in a number of populations. These plants and the biologic crusts upon which they depend need to be left undisturbed. |
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Petalonyx parryi Parry's petalonyx Rare plant species (shrub) In Utah, only lives in Washington County (also occurs in Nevada and Arizona) Blazing star (or Stickleaf) family Primary threats: Urban expansion (the plant pictured to right/top was destroyed by residential development shortly after being photographed in 2004); gypsum mining Recent/impending impacts: Silver Falls/KLC Properties residential development resulted in the destruction of plants/habitat in May 2004 and other residential development near the town of Washington (Washington Fields); Southern Corridor, SITLA actions on White Dome This plant requires gypsipherous soil. An historic St. George population from which it was first collected by Dr. Charles C. Parry no longer exists. A related species, Petalonyx nitidus has not been collected in Utah since the 1930's (Washington County's Santa Clara area) and probably no longer exists in Utah. It is smaller in stature than P. parryi. |
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Sphaeralcea gierischii Gierisch's globemallow Federal candidate species as of Dec. 10, 2008 In Utah, occurs only at extreme southern edge of Washington County Only one population occurs in Utah Also occurs in adjacent Mohave County, Arizona Mallow family Primary threats: Gypsum mining, off road vehicles and other recreational impacts Recent/impending impacts:The growth of Sun River, the new St. George airport and ever increasing local human populations place the lone Utah occurrence at ever increasing peril. All Utah-Arizona occurences occur within roughly a 10 square mile area; total occupied habitat is less than 60 acres. |
Sphaeralcea gierischii |
