Annuals, 7-15 cm (taprooted). Stems strigose. Leaves usually opposite proximally, sometimes alternate (distal); blades lance-linear to linear, 10-160 × 1.5-8(-12) mm, margins ciliate to ¹/4 their lengths, hairs mostly less than 0.5 mm, faces strigose to strigillose (hair bases narrowly tuberculate), abaxial often gland-dotted. Heads 6-25+. Peduncles 0.2-0.5(-2) cm, lengths ¹/20-¹/2 times leafy portions of stems. Involucres 6-14 mm diam. Phyllaries 3-6 mm. Paleae oblong, 4-4.5 mm, acute to cuspidate. Ray florets 12-14; laminae ± elliptic, 5-17 mm (glabrous or puberulent). Disc florets 50+; corollas 2.5-4 mm. Cypselae black or mottled, 1.8-2 mm.

Plant: Annual forb to 1 m Leaves: leaves opposite, linear to narrowly elliptic, short-petiolate to sessile, 3-6 cm long, scabrous References: Kearney & Peebles; Arizona Flora. McDougall; Seed plants of Northern Arizona. ASU specimans