Distribution: Central and eastern portion of Washington; British Columbia east to Saskatchewan, south to Arizona and California.
Habitat: Mud flats, vernal pools.
Growth Duration: Annual
Conservation Status: Review Group 1 in Washington (WANHP)
Subglabrous, pale-greenish annual, the stem simple or branched from the base and spreading, 1-3 dm. tall.
Leaves alternate, numerous, lanceolate, 5-18 mm. long and 3-6 mm. wide, denticulate, sessile.
Flowers crowded in terminal spikes, with floral bracts similar to the leaves; calyx 4-lobed; petals 4, pale pink to reddish-purple, 2-4 mm. long, deeply bilobed; ovary inferior, 4-celled; stamens 8, of two lengths.
Capsule slightly curved, pointed but not beaked, about 7 mm. long and 1-1.5 mm. thick; seeds brownish.