. Characteristics and hybridization of important intermountain shrubs. Compositae Rocky Mountains; Shrubs Rocky Mountains; Sunflowers Great Basin; Shrubs Great Basin. Figure 11.—Sand sage- brush (A. filifoliaj growing near Moccasin^ Mohave Co., Arizona,. is the closest ally to sand sagebrush. Birdfoot sagebrush is a low perennial subshrub with limited distribution on dry plateaus and ridges in Wyoming and Idaho, and possibly in Montana. In gross morphology, sand sagebrush and birdfoot sagebrush little resemble one another, but their floral characteristics are quite similar. Their distributions
. Characteristics and hybridization of important intermountain shrubs. Compositae Rocky Mountains; Shrubs Rocky Mountains; Sunflowers Great Basin; Shrubs Great Basin. Figure 11.—Sand sage- brush (A. filifoliaj growing near Moccasin^ Mohave Co., Arizona,. is the closest ally to sand sagebrush. Birdfoot sagebrush is a low perennial subshrub with limited distribution on dry plateaus and ridges in Wyoming and Idaho, and possibly in Montana. In gross morphology, sand sagebrush and birdfoot sagebrush little resemble one another, but their floral characteristics are quite similar. Their distributions do not presently overlap and no intermediates between the two have been found. Distribution and sagebrush is an excellent indicator of sand and is probably the most widespread shrub on sand dunes and sandhills from Nebraska to Arizona (Hall and Clements 1923). It occurs from Nevada and Utah east to Wyoming and western Nebraska and south to Texas, Arizona, and Chihuahua, Mexico. browse value of sand sagebrush depends on where it grows. It is seldom eaten in grasslands where other food is adequate, but in more arid, desert regions, it is often heavily used (Hall and Clements 1923). This species helps prevent wind erosion by helping to stabilize light sandy soils. Artemisia frigida Willd. (fringed sagebrush^) Fringed sagebrush is a fragrant, aromatic, mat-forming perennial subshrub 2 to 5 dm tall (fig. 13), the lower woody stems are spreading and often much branched. Adven- titious rooting is common when stems contact the soil. The upper herbaceous stems are erect and leafy. The whole plant is densely silvery-canescent. The numerous small silky-canescent leaves are 6 to 12 mm long, and are 2 or 3 times pinnately divided. This species has a deep perennial taproot with numerous extensive laterals that help it withstand drought. This root system is also useful in stabilizing gullies and preventing soil erosion. Numerous small flower heads are borne in nodd
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