百花蒿 bai hua hao

Artemisia centiflora Maximowicz, Bull. Acad. Imp. Sci. Saint-Pétersbourg 26: 493. 1880; A. centiflora var. pilifera Y. Ling; Stilpnolepis centiflora var. pilifera (Y. Ling) H. C. Fu.

Herbs, annual, ca. 40 cm tall, with robust fusiform taproots; stems erect, striate, corymbosely branched in upper part, pubescent. Leaves sessile; leaf blade narrowly lanceolate to linear, 3.5-10 × 0.2-0.4 cm, pinnatisect, both surfaces sparsely pubescent; lateral segments 2- or 3-paired, crowded at base of leaf, stipulelike, short, linear; terminal segments linear, long. Synflorescence a lax, flat-topped cyme. Capitula nodding or declined; peduncle 1.5-3 cm. Involucre cupular-hemispheric, 0.8-2 cm in diam.; phyllaries in 4 or 5 rows, scarious margin broad, outer phyllaries broadly ovate, ca. 7 mm, middle and inner ones ovate or broadly obovate, ca. as long as outer ones or somewhat shorter. Florets many, bisexual, fertile, yellow, 5-lobed, with distinct tube and bowl-shaped limb. Achenes narrowly obovoid-triangular, 5-6 mm, densely glandular, inconspicuously striate. Pappus absent.

Dunes; 1100-1300 m. Gansu, Nei Mongol, Ningxia, Shaanxi [Mongolia].