Oncosiphon pilulifer (L.F.) Källersjö

Erect, strongly aromatic annual herb, to 0.3 m tall; stems sparsely pilose to pilose sometimes glabrous. Leaves bipinnatisect sometimes tripinnatisect, lanceolate to oblanceolate, 10-25 x 5-15 mm, sparsely pilose to pilose; lobes oblong to oblanceolate, 1-3 x ±1 mm, mucronulate. Capitula discoid, homogamous, 5-10 mm diam., in simple, lax corymbs sometimes solitary; peduncles slender, 5-50 mm long, glabrous to sparsely pilose. Involucre hemispherical, 5-10 mm diam., base deeply cordate at anthesis; involucral bracts 3-seriate, strongly deflexed at anthesis, never decurrent on the peduncle, apices level with receptacle base, midvein prominent to inconspicuous, dark brown or green, glabrous, margins and apices narrowly scarious; outer bracts oblong to narrowly elliptical, 2.5-3.5 mm long; middle bract oblong to broadly oblong, 2.5-3 mm long; inner bracts obovate, ±2.7 mm long. Receptacle conical, not obscured by involucral bracts. Disc florets bisexual, corolla 2-3 mm long, yellow; tube conspicuously swollen from the apex to the base, lanceolate to oblong, 1-2 mm long; limb campanulate, ±1 mm long; lobes ovate, ±0.5 mm long. Pappus inconspicuous to small, irregularly lobed, ±0.1 mm long. Flowering is from late winter to early summer (August to December).