Distribution: In the Cascade and Blue Mountains of Washington; Washington south to California, east to Montana, Colorado and New Mexico.
Habitat: Open rocky slopes at mid- to high elevations in the mountains.
Conservation Status: Not of concern
Sweetly aromatic perennial from a stout, woody taproot and branched crown, the numerous slender, simple stems up to 3 dm. tall.
Leaves sessile, opposite, palmately divided, the principle leaves 5- to 9-cleft into spinulose-tipped linear segments up to 2 cm. long, often with several smaller leaves in the axils.
Flowers sub-sessile in compact, leafy-bracteate clusters terminating the stems; calyx sub-herbaceous, 5-lobed, 6-9 mm. long; corolla creamy white, the slender tube equaling the calyx, the flaring limbs about 1 cm. wide; stamens 5, equally inserted; style 3-parted; ovary superior.
Capsule with 3 carpels; usually only 1 of the 2-4 seeds maturing in each carpel.