西南大头蒿 xi nan da tou hao

Artemisia smithii Mattfeld var. speciosa Pampanini, Nuovo Giorn. Bot. Ital., n.s., 36: 423. 1930; A. smithii f. paniculata Pampanini.

Herbs, perennial, 60-80 cm tall, puberulent. Lower and middle stem leaves ± sessile; leaf blade ovate or broadly ovate, 7-9 × 4-6 cm, abaxially densely gray arachnoid tomentose, adaxially sericeous-pubescent, 2-pinnatisect; segments 4 or 5 pairs; lobules linear-lanceolate or falcate-lanceolate, 20-40 × 1.5-2.5 mm; rachis narrowly winged. Uppermost leaves pinnatisect or 3-5-lobed; leaflike bracts linear-lanceolate. Synflorescence a narrow panicle. Involucre hemispheric, 5-7 mm in diam.; phyllaries rust-colored pubescent. Marginal female florets 10-20. Disk florets 30-45, bisexual. Achenes obovoid. Fl. and fr. Sep-Oct.

● Rocky slopes, grasslands, shrublands, terraces, roadsides; 3000-3800 m. W Sichuan, E Xizang, NW Yunnan.