Plant: Annual forb to 20 cm Leaves: leaves alternate, linear and dissected INFLORESCENCE: compound umbels; peduncles 1-5 cm; bractlets few, thread-like to linear, entire or toothed; rays 5-14, 1-15 mm, generally ± ascending, very unequal; pedicels generally < 7 mm, those of central flower of each secondary umbel generally 0 Flowers: flowers minute, cream Fruit: 2 mm, globose, covered in bristles. Misc: Rocky slopes, sandy flats; 60-1500 m. References: Kearney & Peebles. Arizona Flora.J.C. Hickman, ed. The Jepson Manual. A. Cronquist. An integrated system of classification of flowering plants. ASU specimens.