Distribution: Yakima County, Washington, south to northcentral Oregon and east to southeast Washington and western Idaho; along the Snake River.
Habitat: Mossy rocks to open, gravelly hillsides, chiefly in canyons.
Flowers: May - Early July
Conservation Status: Not of concern
Weak perennial from short, slender rhizomes, the few, simple flowering stems upright, 7-12 cm. tall, with few sterile branches.
Basal leaves crowded is rosettes, oval, some less than 5 mm. long, rice-like in appearance, others more elongate and spatulate, covered with short projections; cauline leaves near the base narrowly spatulate-oblanceolate, up to 25 mm. long, reduced upward to obovate and 6 mm. long.
Flowers numerous in several-rayed, spreading cymes, sessile; sepals 5, triangular to lance-ovate, 1-1.5 mm. long; petals 5, distinct, narrowly elliptic-lanceolate, acuminate, 5-8 mm. long; stamens 10, shorter than the petals; pistils 5.
Follicles 5, widely spreading, basally united for 1 mm., covered with glandular projections.
Flowers with more than 5 follicles, as shown in the photos, are rare.