Plant: Annual 10-60 cm; stem simple to branched throughout, strigose; some hairs ascending Leaves: 1-4(5) cm, simple, entire, linear to oblong, generally bristly; bristles ± ascending; basal whorled; cauline generally opposite below, alternate above INFLORESCENCE: cymes, generally dense in fruit; lowest flowers sometimes not touching Flowers: sepals 3-3.5 mm, (4)6-10 mm and linear in fruit, densely rough-hairy and bristly, hairs ascending, bristles spreading; corolla generally white, tube generally 1-13 mm, appendages 5, white to yellow, corolla limb 1-2 mm wide; anthers included; ovary generally 4-lobed Fruit: Fruit: nutlets 4, 2-2.5 mm, lanceolate, back densely tubercled, groove on inside surface ± closed, forked or flared open at base Misc: Sandy, gravelly soils; < 2100 m.; Mar-May References: Arizona Flora, Kearny and Peebles; Seed Plants of N. Arizona, McDougall; The Jepson Manual, Hickman, ed.