Plant: Annual 10-100 cm; stem branched throughout or above middle, thinly strigose and spreading-soft- to rough-hairy Leaves: 0.5-4 cm, simple, entire, ± linear, rough-hairy to bristly; some bristles bulbous-based; basal whorled; cauline generally opposite below, alternate above INFLORESCENCE: cymes, generally open in fruit; upper flowers sometimes touching or overlapping Flowers: sepals 1-2 mm, 2-4 mm and ± lanceolate in fruit, strigose and spreading-bristly; corolla generally white, tube generally 1-13 mm, appendages 5, white to yellow, corolla limb 2-6 mm wide; anthers included; ovary generally 4-lobed Fruit: Fruit: nutlets 4, 1-2 mm, ovate to deltate, back tubercled, groove on inside surface ± closed, forked to flared open at base Misc: Sandy or gravelly, open areas; 150-2700 m.; Apr-Jun References: J.C. Hickman. The Jepson Manual. Kearney & Peebles. Arizona Flora. W.B. McDougal. Seed plants of Northern Arizona. ASU specimens.