硫磺菊 liu huang ju

Plants 30-200 cm tall, glabrous or sparsely pilose to hispid. Leaves petiolate; petiole 1-7 cm; blade 5-12(-25) cm, ultimate lobes 2-5 mm wide, margin sparsely spinulose-ciliate, apex apiculate. Peduncles 10-20 cm; calycular bracts spreading-ascending, linear-subulate, 5-7(-10) mm, apices acute; involucre 6-10 mm in diam.; phyllaries erect, oblong-lanceolate, 9-13(-18) mm, apices acute to rounded-obtuse. Ray corollas intensely yellow to red-orange, lamina obovate, 18-30 mm, apices ± truncate, denticulate. Disk corollas 6-7 mm. Achenes 15-30 mm, usually hispidulous, rarely glabrous; pappus absent, or of 2 or 3 widely divergent awns 1-7 mm. Fl. Jun-Sep. 2n = 24, 48.

Introduced in Beijing, Guangdong, and Yunnan [native to Mexico].