盘花乳菀 pan hua ru wan

Chrysocoma biflora Linnaeus, Sp. Pl. 2: 841. 1753; Crinitaria biflora (Linnaeus) Cassini; Galatella dracunculoides Nees var. discoidea Candolle.

Herbs, perennial, caespitose, 45-100 cm tall, shortly papilliform hairy, scabridulous or glabrate; rhizome short. Stems numerous, rarely solitary, erect. Leaves dense, lower fallen after anthesis, mid sessile, usually dingy green, blade oblong-lanceolate or lanceolate to linear-lanceolate, 5.5-6 × 0.4-0.5 cm, surfaces gland-dotted or abaxially eglandular, scabridulous or glabrate, 3-veined, base gradually cuneate, apex long acuminate; upper reduced, linear-lanceolate. Capitula numerous, in usually dense, rarely slightly loose, corymbiform synflorescences, 8-11 × 10-12 mm. Involucre obconic, 3-5 × 4-7 mm; phyllaries 3- or 4-seriate, yellowish green, membranous, abaxially glabrate or ± scabridulous, 3-veined, rarely partly 1-veined, margin scarious, erose-fimbriate, outer small, ovate-lanceolate, apex acute, innermost larger, oblong, apex obtuse or acute. Ray florets usually absent, rarely 1-3(or 4); disk florets 8-25, pale yellow, 6-7 mm, limb funnelform, lobes long, oblong-lanceolate. Achenes oblong, 3.5-4 mm, densely white silky. Pappus whitish, 5-6 mm. Fl. and fr. Jul-Sep.

Grasslands on slopes; ca. 1700 m. W Xinjiang [Kazakhstan, Russia].