Annual herb, 60-150 mm, stem strongly flexuous, corymbosely branched above. Leaves alternate, ascending, mostly 20-60 x 15-20(-35) mm, pinnatisect or bipinnatisect, with up to 10 lobes on each side, lobes alternate or subopposite and subsecund, filiform to linear, 3-15 x 0.5 mm, entire or with 1 or 2 lobules, upper-most leaves usually pinnatisect, sometimes simple and filiform. Capitula solitary, pedunculate; peduncles 20-50 mm long, with 2 or 3 minute, scale-like bracts. Involucre cylindrical to subglobose, 4-5 x 4-5 mm, bracts 13-16, free, convex abaxially and canaliculate adaxially, leathery and three-veined in basal two-thirds, with membranous margins, penicillate. Ray florets fewer than involucral bracts, 7-10, yellow; tube cylindrical, 2.5 mm long, with abaxial trichomes near top; blade 7-10 x 1.5-2.0 mm, spreading, recurved apically; ovary terete with slightly thickened distal collar, 1.5 mm long, glabrous, style branches exserted, 1 mm long. Disc florets bisexual, yellow, 5 mm long; tube funnel-shaped, ±3 mm long; lobes ±1 mm long, ovate, acute; ovary terete, 1.5 mm long, glabrous, style branches 1 mm long. Cypselas unknown.
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