柳叶亚菊 liu ye ya ju

Tanacetum salicifolium Mattfeld ex Rehder & Kobuski, J. Arnold Arbor. 13: 207. 1932; Chrysanthemum linearifolium C. C. Chang; C. salicifolium (Mattfeld ex Rehder & Kobuski) Handel-Mazzetti; Phaeostigma salicifolium (Mattfeld ex Rehder & Kobuski) Muldashev.

Subshrubs, 30-60 cm tall. Flowering branches purple-red, sericeous, especially in upper part and on synflorescence branches. Lower and middle stem leaves sessile; leaf blade linear to lanceolate, 5-10 × 0.3-1 cm, abaxially white, densely and thickly sericeous, adaxially green, glabrous, margin entire. Upper stem leaves progressively smaller. Synflorescence a dense terminal flat-topped panicle. Capitula many. Involucres campanulate, 4-6 mm in diam.; phyllaries in 4 rows, scarious margin broad, brown, outer ones ovate, ca. 2 mm, abaxially sparsely sericeous, middle and inner ones ovate or ovate-elliptic to linear-lanceolate, 3-4 mm. Florets yellow; marginal female florets 6, corolla narrowly tubular, ca. 2 mm, apex 3-denticulate; disk florets many, corolla tubular, ca. 3.5 mm. Achenes ca. 1.8 mm. Corona absent. Fl. and fr. Jun-Sep.

● Mountain slopes; 2600-4600 m. Gansu, Qinghai, Shaanxi, Sichuan.