羽裂扁毛菊 yu lie bian mao ju

Waldheimia tomentosa (Decaisne) Regel.

Herbs, perennial, 10-15 cm tall, with procumbent much-branched rhizomes. Stems many, laxly caespitose, branched or not, bases with remains of brown scarious leaf sheaths. Petioles enlarged at base; leaf blade oblong to linear-oblong, 4-5 × 0.2-1.5 cm, 2-pinnatipartite, both surfaces white arachnoid lanate, primary lateral pinnae 6-9-paired, distal pinnae gradually smaller; ultimate pinna lanceolate to ovate, apex long mucronulate. Capitulum solitary, pedunculate. Involucre hemispheric, 17-20 mm in diam.; phyllaries in 3 or 4 rows, abaxially lanate, scarious margin broad, dark brown, outer ones lanceolate, short, apex acute, inner ones linear-oblong, subscarious. Ray florets 10-20, white or pale pink; lamina linear-oblong, 6-11 mm. Disk florets yellow, 5-lobed. Achenes narrowly oblong, ca. 4.5 mm, 6-8-ribbed; ribs pale red-brown in upper part, sparsely villous in upper 1/2, with sessile glands; corona scales many, ca. 6 mm, brownish at apex. Fl. and fr. Aug-Sep.

Talus on mountain slopes; 4200-5200 m. W Xizang (Burang) [Afghanistan, India, Kazakhstan, Pakistan, Uzbekistan].