based on geology and temperature/elevation in Section 7 Range – Delta, Mesa, and Garfield Counties Soils gravelly or rocky surfaces on river terrace deposits and lower – mesa slopes If conducted when April Late May Geology Dakota sandstone, Wasatch Formation, Eolian Deposits – – flowering:3 meters Colorado for flowering Aspect more abundant on south slopes Sclerocactus – hookless cactus Slope flat to moderate slopes glaucus – Elevation 1,300 to 2,100 m (4,250 to 6,900 ft) – Plant Community desert shrubland (shadscale, galleta grass, – Indian rice grass); sagebrush; and pinyon-juniper Common Associates Gutierrezia sarothrae, Opuntia polyacantha, – and Ephedra viridis Section 7 Range based on the habitat model done by the Colorado – Natural Heritage Program high alkaline, gypsiferous clay soils Soils – Geology upper Cretaceous Mancos and Fruitland Shales – Aspect various – Slope on the tops and slopes of hills and benches – Mesa Verde Elevation 1,400 to 2,000 m (4,600 to 6,560 ft) Sclerocactus – April-May 3 meters cactus sparsely vegetated Great Basin Desert Scrub (Saltbush Series) Habitat mesae-verde – and Desert Grassland Ecotone communities on low rolling hills, particularly hilltops and benches Common Associates Atriplex corrugata, A. cuneata, A. corrugata, A. – confertifolia,A. gardneri, Artemisia spinescens, Achnatherum and hymenoides, Pleuraphis jamesii, Phlox longifolia, Bromus tectorum, Salsola kali.
Sclerocactus glaucus Colorado hookless cactus April – Late May for flowering If conducted when flowering:3 meters Section 7 Range – based on geology and temperature/elevation in Delta, Mesa, and Garfield Counties Soils – gravelly or rocky surfaces on river terrace deposits and lower mesa slopes Geology – Dakota sandstone, Wasatch Formation, Eolian Deposits Aspect – more abundant on south slopes Slope – flat to moderate slopes Elevation – 1,300 to 2,100 m (4,250 to 6,900 ft) Plant Community – desert shrubland (shadscale, galleta grass, Indian rice grass); sagebrush; and pinyon-juniper Common Associates – Gutierrezia sarothrae, Opuntia polyacantha, and Ephedra viridis Sclerocactus mesae-verde Mesa Verde cactus April-May 3 meters Section 7 Range – based on the habitat model done by the Colorado Natural Heritage Program Soils – high alkaline, gypsiferous clay soils Geology – upper Cretaceous Mancos and Fruitland Shales Aspect – various Slope – on the tops and slopes of hills and benches Elevation – 1,400 to 2,000 m (4,600 to 6,560 ft) Habitat – sparsely vegetated Great Basin Desert Scrub (Saltbush Series) and Desert Grassland Ecotone communities on low rolling hills, particularly hilltops and benches Common Associates – Atriplex corrugata, A. cuneata, A. corrugata, A. confertifolia,A. gardneri, Artemisia spinescens, Achnatherum hymenoides, Pleuraphis jamesii, Phlox longifolia, Bromus tectorum, and Salsola kali.
Plant_Guidance_030613.docx