Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Baja California, east to the Rocky Mountains.
Habitat: Dry, open, sandy or rocky places, from sagebrush desert and plains to moderate elevations in the drier mountains.
Conservation Status: Not of concern
Branched shrub 1-6 dm. tall, sweetly aromatic, usually glabrous and occasionally glandular.
Leaves numerous and crowded, alternate, or the lower opposite, 5-12 mm. long, divided palmately into 3-7 linear, rigid, spinulose-tipped segments
Flowers solitary in the leaf axils; calyx 7-10 mm. long, with translucent intervals between the 5 segments, which terminate in a spinulose tip; corolla white to yellowish, with a hint of lavender on the outside, 1.5-2.5 mm. long, the slender lobes 6-10 mm. long, opening at night; anthers 5, small, the filaments equally inserted above the middle of the corolla tube; style 3-parted; ovary superior.
Capsule usually with 3, several-seeded carpels.