. Characteristics and hybridization of important intermountain shrubs. Compositae Rocky Mountains; Shrubs Rocky Mountains; Sunflowers Great Basin; Shrubs Great Basin. Leaves on the vegetative stems are green, nearly glabrous, viscidulous, 2 to 4 mm wide, 2 to 8 mm long and are pinnatified with 3 to 11 lobes, or sometimes may be only toothed. Leaves on the flowering branches are usually reduced and may be entire. Heads with 3 to 5 disc flowers are arranged into spikelike inflorescence. Ray flowers are lacking. Twelve to 18 greenish-yellow bracts subtend each head. Achenes are glabrous. Flowers
. Characteristics and hybridization of important intermountain shrubs. Compositae Rocky Mountains; Shrubs Rocky Mountains; Sunflowers Great Basin; Shrubs Great Basin. Leaves on the vegetative stems are green, nearly glabrous, viscidulous, 2 to 4 mm wide, 2 to 8 mm long and are pinnatified with 3 to 11 lobes, or sometimes may be only toothed. Leaves on the flowering branches are usually reduced and may be entire. Heads with 3 to 5 disc flowers are arranged into spikelike inflorescence. Ray flowers are lacking. Twelve to 18 greenish-yellow bracts subtend each head. Achenes are glabrous. Flowers bloom in August and September, and seed matures in October. Seeds are large for Artemisia. Cleaned seed average 970 per gram (440,000 per pound). '^oth. diploid (2n = 18) and tetraploid (2n = 36) forms of A. pygmaea are knovvn (Ward 1953; McArthur and Pope, data on file at the Shrub Sciences Laboratory, Prove, Utah). Distribution and sagebrush is limited to calcareous soils in desert areas over approximately 5,000 hectares (21 square miles) from eastern Utah to western Nevada, and northern Arizona (Ward 1953; Beetle 1960; McArthur and Plummer 1978) (fig. 19). In Nevada, this species is often associated with the halophytic C. nauseosus ssp. consimilis. Some fairly large stands occur with black sagebrush in Utah. Its type locality is Fish Creek, near Eureka, Nevada. of its scarcity and small size, this species has little value as browse. It does, however, provide important ground cover in the dry, alkaline areas where little else will grow. It establishes readily by transplanting divided plants. Although it spreads well from naturally dispersed seed, artificial planting of seed has not been successful. Artemisia rigida (Nutt.) Gray (stiff or scabland sagebrush) Stiff sagebrush is a low, pungently aromatic shrub with thick, rigid, somewhat brittle branches up to 4 dm high (fig. 20). It is not known to rootsprout or layer. The deciduous
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