Report On the Conservation Status of Lesquerella Humilis a Candidate Threatene
Report On the Conservation Status of Lesquerella Humilis a Candidate Threatene
P L Achuff
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Edaphic factors: Lesquerella humilis occurs on poorly developed, sandy or stony soils derived from metamorphic bedrock. No analyses of soil characteristics have been done. The St. Mary and St. Joseph massifs consist of high grade metamorphic rocks, mostly gneiss and schist, locally penetrated by granitic rocks (Lackschewitz 1970, 1986; Ross et al. 1955) . Although appearing largely granitic in character, the rocks on St. Mary Peak are slightly reddish-orange in color, and the St. Joseph Peak ma...ssif is similarly colored. Lesquerella humilis is restricted to this area, but it is not known whether this restriction is strictly edaphic in nature. 6. Dependence of this taxon on natural disturbance: Lesquerella humilis is associated with open sites that are exposed to strong winds. Consequently, these sites are sparsely vegetated with little soil development. Steeper sites may also be subject to some disturbance from soil creep or solif luction. 7. Other unusual physical characteristics: None observed.
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