美国西南部和墨西哥沙漠地区的一种灰绿色灌木，叶极疏，蓝紫色花成顶生穗状花序；为当地一种重要的蜜源植物，产生一种味道优良的淡色蜜。

• grayish-green shrub of desert regions of southwestern United States nd Mexico having sparse foliage and terminal spikes of bluish violet flowers; locally important as source of a light-colored honey of excellent flavor.