Oncosiphon africanus (P.J.Bergius) Källersjö

Sprawling or sometimes erect, annual herb, to 0.3 m tall; stems glabrous to sparsely pilose. Leaves 1-or 2-pinnatisect, lanceolate to oblanceolate, 10-30 (50) x 5-20 mm, sparsely pilose; lobes oblong to lanceolate, 3-9 mm x ±1 mm, mucronulate. Capitula radiate, heterogamous, 15-26 mm diam., in simple, lax corymbs sometimes solitary; peduncles thickened toward the base of capitula, 10-50 (75) mm long, sparsely pilose near the apex. Involucre broadly hemispherical, 7-13 mm in diam., base shortly attenuate to slightly cordate in mature heads; involucral bracts 3-seriate, suberect to slightly deflexed at anthesis, never decurrent on the peduncle, apices above the receptacle apex, midvein inconspicuous, glabrous, margins and apices broadly scarious; outer series ovate, ±2 mm long; median series ovate to broadly ovate, 3-4 mm long; inner series broadly ovate, 2-4 mm long. Receptacle conical-globose, obscured by involucral bracts. Ray florets female-fertile; tube 2-3 mm long, glandular trichomes sessile; limb 4-5 mm long, oblong, white. Disc florets bisexual, corolla 2-3 mm long, yellow; tube not conspicuously swollen, ca. 1.6 mm long; limb campanulate, ±1.2 mm long; lobes ovate, ±0.5 mm long. Pappus prominent, obliquely cup-shaped, adaxially longer, irregularly lobed, ±0.7 mm long. Flowering is in spring (September to October).