Plant: Annual 10-40(50) cm; stem generally branched throughout; branches few, strigose and rough-hairy, hairs generally ascending Leaves: 0.5-5 cm, simple, entire, linear to oblong, bristly; bristles ascending; basal whorled; cauline generally opposite below, alternate above INFLORESCENCE: cymes, generally open in fruit; lowest flowers not touching Flowers: epals free, 2-2.5 mm, 4-6 mm and widely lanceolate to ovate in fruit, densely strigose to rough-hairy, hairs ascending, bristles few or 0; corolla generally white, tube generally 1-13 mm, appendages 5, white to yellow Fruit: Fruit: nutlets 3-4, ± 2 mm, winged or 3 clearly winged, 1 not, back tubercled to white-granular, groove on inside surface flared open to 2-forked at base; winged nutlet widely ovate to ± round, wing generally minutely white-lobed; wingless nutlet narrowly ovate Misc: Sandy to gravelly soils; < 2500 m.; Mar-Jun References: J.C. Hickman. The Jepson Manual. Kearney & Peebles. Arizona Flora. W.B. McDougal. Seed plants of Northern Arizona. ASU specimens.