. Characteristics and hybridization of important intermountain shrubs. Compositae Rocky Mountains; Shrubs Rocky Mountains; Sunflowers Great Basin; Shrubs Great Basin. Low sagebrush ranges from southern Colorado to western Montana and west throughout Utah and Idaho to northern California, Oregon, and Washington. Type locality is listed as "arid plains of Lewis (Snake] River" (Beetle 1960). Normally its sites are drier and more rocky than those on which big sagebrush occurs. Low sagebrush and black sage- brush rarely occur in intermixed stands, for example, the Lost River-Lemhi Range a
. Characteristics and hybridization of important intermountain shrubs. Compositae Rocky Mountains; Shrubs Rocky Mountains; Sunflowers Great Basin; Shrubs Great Basin. Low sagebrush ranges from southern Colorado to western Montana and west throughout Utah and Idaho to northern California, Oregon, and Washington. Type locality is listed as "arid plains of Lewis (Snake] River" (Beetle 1960). Normally its sites are drier and more rocky than those on which big sagebrush occurs. Low sagebrush and black sage- brush rarely occur in intermixed stands, for example, the Lost River-Lemhi Range area of Idaho (E. F. Schlatterer, letter 12/1/77). In areas where the distribution of these two species overlaps, low sagebrush is usually found in the more moist habitats or at slightly higher elevations than black sagebrush (Ward 1953). winter ranges and to a limited extent on summer ranges, low sagebrush is browsed by big game and livestock. There is considerable variation in how animals browse it in different locations. In Nevada, the gray-green form may be heavily browsed while the green form is only lightly browsed (Brunner 1972). Sage grouse also appar- ently prefer the lighter form to the darker one. Similarly, black sagebrush also has two color morphs, with the light (gray-green) one preferred by browsing animals. Artemisia bigelovii Gray. (Bigelow sagebrush) Bigelow sagebrush is a low shrub 2 to 4 dm high with numerous spreading branches. The flowering stems are slender and erect and bear inflorescences that are long, narrow panicles with short, recurved branches (figs. 5b, 7). New growth is covered with a silvery-canescent pubescence. The leaves of vegetative branches are similar to those of big sagebrush. They are narrowly cuneate, 1 to 2 cm long, 2 to 5 mm wide, and normally tridentate, but may show various abnormal tips. The odor of crushed leaves is mild like that of mountain big sagebrush {A. tridentata ssp. vaseyana). The heads are arranged into elongat
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