丝裂亚菊 si lie ya ju

Chrysanthemum nematolobum Handel-Mazzetti, Acta Horti Gothob. 12: 271. 1938.

Subshrubs, ca. 30 cm tall. Old branches short; young branches pale purple or pale green, glabrous. Lower and middle stem leaves sessile; leaf blade broadly ovate or cuneate, 1-2 × 1-4 cm, both surfaces green or pale green, glabrous or very sparsely puberulent, biternately palmatisect or palmate-pinnatisect; primary lateral segments 1-paired; ultimate segments filiform. Upper leaves small, 3-5-sect. Synflorescence a terminal flat-topped panicle. Capitula few to many. Involucres campanulate, 2.5-3 mm in diam.; phyllaries in 4 rows, straw-colored, glossy, abaxially glabrous, scarious margin hyaline, outer ones ovate, ca. 1 mm, middle and inner ones broadly obovate, 2.5-3 mm. Florets yellow; marginal female florets 5, corolla narrowly tubular, ca. 1.5 mm, apex laterally acutely 2-denticulate; disk florets: corolla tubular, ca. 2 mm. Achenes nearly 1 mm. Fl. and fr. Sep-Oct.

● Mountain slopes; 1700-2300 m. Gansu, Nei Mongol, Qinghai.