黄花亚菊 huang hua ya ju

Tanacetum nubigenum Wallich ex Candolle, Prodr. 6: 130. 1838; Chrysanthemum nubigenum (Wallich ex Candolle) Handel-Mazzetti; Dendranthema nubigenum (Wallich ex Candolle) Kitamura.

Herbs, perennial, ca. 30 cm tall, with slender fibrous roots. Stems unbranched or branched from base or lower part, densely pubescent. Middle stem leaves: petiole 3-5 cm; leaf blade orbicular or broadly ovate, ca. 1 × 1 cm, both surfaces gray-white, densely pubescent, tripinnatisect or inconspicuously tripinnatisect; primary lateral segments 2-paired; ultimate segments linear. Distal stem leaves progressively smaller. Synflorescence a terminal compound flat-topped panicle, ca. 3 cm in diam.; synflorescence branches and peduncles white, densely pubescent. Capitula many. Involucres campanulate, ca. 5 mm in diam.; phyllaries in 4 rows, abaxially sparsely pubescent, scarious margin dark brown, apex obtuse or rounded, outer ones linear-lanceolate, ca. 2.5 mm, middle and inner ones narrowly elliptic or oblanceolate, 3-4 mm. Florets yellow, exterior with sessile glands; marginal female florets 8, corolla narrowly tubular, ca. 2 mm, apex obtusely 3-denticulate; disk florets: corolla tubular, ca. 3 mm. Fl. Aug.

Mountain slopes; 3900-4100 m. Gansu, Sichuan, Xizang (Gyirong), Yunnan [Bhutan, India, Nepal].

"Artemisia nubigena" (Wallich, Numer. List, no. 3233. 1831) belongs here but is a nomen nudum and was therefore not validly published (Vienna Code, Art. 32.1(d)).