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3.0 RESULTS AND DISCUSSION <br />• <br />Two cacti officially listed by the U. S. Fish and Wildlife Service (USFWS <br />19801 as-- threatened or en d are potentially present in the study area, <br />based on known geographic ranges and habitat affinities. <br />The hookless Uinta Basin cactus laedivcactu~ q,laucu~ or Scleiwcactcr~ <br />s.laucu~l, designated as "threatened" by the USFWS, occurs in the Grand <br />Junction area. Its habitat is described by USFS and FWS 119801 as "dry <br />alkaline hills with many rocks (at] 5,000 ft. .associated with A.t~tip.leX <br />cort~e~ti,Cv.l.ia, Hida~cia ~.mne.~i.i, and Ephediea spp." Designated as "endangered" <br />is the spineless hedgehog cactus (Echirtviceaeu~ #~,is.lvchidiv#u~ var. irte~unel, <br />which is known to occur in northern Mesa County. Its habitat affinities are <br />described as "partial shade in duff that accumulates under pinyon pine. . <br />and infrequently among sagebrush on cool exposures [at] 5,000-8,000 ft" <br />(USFS and FWS 19791. Neither of these cacti were observed during the summer <br />1982 or spring lMayl 1983 field surveys. <br />Two additional species currently under review for possible listing as <br />threatened or endangered IFWS 19801 are ootentially present in the study <br />area. However, neither of these species-Wetherill milkvetch (Aa#~cagv.lu~ <br />u~e.the2i.l.(i.il and cliffdweller candlestick IGc~ptarttha e.lv#al-has been <br />positively identified to date. Neither of these plants were observed during <br />the summer 1982 or the spring 1983 field surveys. <br />• Similarly, none of the species listed by the Colorado Natural Heritage <br />Inventory (19801 (Table 11 or the U.S. Bureau of Land Management (BLM 19811 <br />as "sensitive plant species" (Table 21 was found in the study area. <br /> <br />• <br />-3- <br />