Plant: Annual 10-40 cm; stem simple to branched throughout, strigose to rough-hairy or bristly; hairs appressed to spreading Leaves: 0.5-5 cm, linear to narrowly lanceolate; bristles appressed to spreading; basal whorled; cauline generally opposite below, alternate above, simple, entire INFLORESCENCE: cymes, dense to open in fruit; lower flowers not touching, appressed to ascending in fruit Flowers: sepals free, 1.5-2.5 mm, 2-4 mm and linear-oblong in fruit, densely bristly to rough-hairy, hairs ascending to spreading; corolla generally white, tube generally 1-13 mm, appendages 5, white to yellow; corolla limb 1-5 mm wide; anthers included; ovary generally 4-lobed Fruit: Fruit: nutlets 1-2, 1.5-2 mm, lanceolate, generally white-granular throughout, sometimes smooth, shiny, white-granular near tip, groove groove on inside surface closed to ± open, sometimes flared open at base, raised, edges sharp-angled Misc: Open, sandy areas, grassland, scrub; < 1500 m.; Mar-May References: J.C. Hickman. The Jepson Manual. Kearney & Peebles. Arizona Flora. W.B. McDougal. Seed plants of Northern Arizona. ASU specimens.