. Botanical survey of the Ruby Range, Madison County, Montana, Dillon Resource Area, Bureau of Land Management . Botany; Botany; Rare plants; Rare plants. Note: Herbarium specimens in Oryzopsis hymenoides folders have been checked at MONT (Rumely pers. conimun.) and at MONTU (Heidel pers. obs.) without finding additional collections for annotation to O. contracta. This information has been sent to the Beaverhead National Forest, which maintains a small herbaria with collections from southwestern Local distribution: One large site was documented for the species on private land at the
. Botanical survey of the Ruby Range, Madison County, Montana, Dillon Resource Area, Bureau of Land Management . Botany; Botany; Rare plants; Rare plants. Note: Herbarium specimens in Oryzopsis hymenoides folders have been checked at MONT (Rumely pers. conimun.) and at MONTU (Heidel pers. obs.) without finding additional collections for annotation to O. contracta. This information has been sent to the Beaverhead National Forest, which maintains a small herbaria with collections from southwestern Local distribution: One large site was documented for the species on private land at the lowest end of the Garden Creek Allotment, on the southeast edge of the Ruby Mountains project area. It spamied over 100 acres across an area o\tx 1/2 mile long in T7S R5W Sec. 34, and is likely to extend onto adjoining lands under mixed public/private ownership. HABITAT: The Ruby Range study area has the largest known population to date, so its habitat is described in detail first and is used for comparison with all other sites. It falls within the documented range of habitats in Wyoming, summarized as dry, shallow, sandy, or gravelly soils on slopes or rolling plains in open, sagebrush-grassland communities (Fertig 1994). The study site is a very dry setting, on shallow sandy to silty soils, over a variety of topographic positions across rolling grassland knolls, small silty outcrops, and uplands suiTounded by sagebrush steppe at the interface between the montane and intennontane zones. It is on 0-20% slope, with a predominantly gentle slope and southeast aspect but all compasspoints included. In Beaverhead County the topographic positions of Oryzopsis contracta were on mid to lower slopes (0-30%) with most commonly south and west aspects, but in Pondera County, the small population was restricted to a ridgetop. The known range of elevations in Montana is 3890-7000 ft. with the lowest elevation site in Pondera County and the highest elevation site at tlie historic Beaverhead N
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