any of several aromatic plants of the genus Artemisia, esp A. tridentata, a shrub of W North America, having silver-green leaves and large clusters of small white flowers: family Asteraceae (composites)
sagebrush in American English
(ˈseɪdʒˌbrʌʃ)
US
noun
any of a number of plants (genus Artemisia) of the composite family, common in the dry, alkaline areas of the W U.S.; esp., the big sagebrush (A. tridentata), with small, aromatic leaves and minute flower heads, important as a forage plant