Distribution: Occurring east of the Cascades crest in north-central Washington; southern British Columbia to northern Washington.
Habitat: Rocky, exposed slopes and ledges at lower elevations in the mountains.
Growth Duration: Perennial
Conservation Status: Not of concern
Glabrous, herbaceous perennial from a branched crown, with numerous, branching, ascending stems 1.5-3 mm. thick, forming cushions usually less than 5 cm. broad.
Leaves alternate, fleshy, linear-terete, 5-12 mm. long and 1-2 mm. broad, deciduous except for the hardened, basal portions of the midrib, many of which persist along the stem as weak bristles.
Flowers 3-9 in minutely bracteate, spreading, flat-topped cymes 2-3 cm. long; peduncles 2-5 cm. long; sepals 2, orbicular, about 3 mm. long; petals 5, broadly ovate, 6-8 mm. long, usually white, soon withering; stamens 15-30; style 3-cleft
Capsule about 3 mm. long
PNW Herbaria: Specimen records of Phemeranthus sediformis in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Phemeranthus sediformis checklist entry.
OregonFlora: Phemeranthus sediformis information.
E-Flora BC: Phemeranthus sediformis atlas page.
CalPhotos: Phemeranthus sediformis photos.
USDA Plants: Phemeranthus sediformis information.