Senecio diaschides

Erect perennial or annual herb, not or hardly branched below inflorescence, to c. 1.2 m high, glabrous or young growth sparsely and minutely pubescent. Leaves sessile, sometimes auriculate, oblong or narrow-oblanceolate, 6–18 cm long, 4–25(–50) mm wide, the lower largest, coarsely and usually evenly dentate, or pinnatisect, the upper reduced, linear, distantly serrate or entire. Inflorescence corymbose, typically 2–12 cm across, with c. 10–25 capitula per corymb; capitula non-radiate; involucre cylindric, 5–6 mm long, glabrous; bracts 8 or 9(–11); bracteoles present; florets 8–16(–21), bisexual and unisexual. Cypselas fusiform, c. 2.5 mm long, brown, broadly ribbed, papillose-hairy in intervening grooves; pappus of slender hairs 3.5–5 mm long, deciduous. Flowers Nov.–Apr.