Pteronia scariosa L.F.

A shrub 2-3 ft, high; branches flexuous, glabrous. Leaves alternate, obovate or oblong-obovate, rounded at the apex, about 5 mm long and 2 mm broad, thick and coriaceous, glabrous. Heads solitary, terminal, subcampanulate, nearly 2 cm long, about 1.8 cm in diameter, 14 flowered. Involucral bracts about 6-seriate; the outermost much smaller than the others, broadly ovate, subacutely mucronate, 3. 5 mm long, 2 mm broad, broadly keeled, with membranous hyaline margins, glabrous, remaining bracts gradually larger; the innermost series narrowly elongate-oblong, strongly keeled, with the keel produced at the apex beyond the broadly membranous slightly jagged margins, about 1.5 cm long and 4 mm broad, glabrous. Receptacle flat, slightly jagged, about 3 mm in diameter. Corolla tube 8 mm long, glabrous, strongly 5-ribbed for 2.5 mm long at the base, the remaining upper portion cylindric; lobes linear-lanceolate, subacute, 2 mm long, with reddish-brown margins when dry. Anthers 4.5 mm long, acute. Achenes 4 mm long, long-villous with ascending hairs, contracted at the top into a short glabrous neck. Pappus reddish-brown when dry, 1-3 cm long, inserted on a distinct annulus.