细裂亚菊 xi lie ya ju

Chrysanthemum przewalskii (Poljakov) H. Ohashi & Yonekura.

Herbs, perennial, 35-80 cm tall; rhizomes short, procumbent, with slender fibrous roots; cataphylls brown, ovate. Stems erect, shortly branched at apex, red-purple, pubescent, especially in upper part. Petiole ca. 1 cm; leaf blade broadly ovate or ovate, 2-5 × 1.5-4 cm, abaxially gray-white, densely pubescent, adaxially green, glabrous or sparsely pubescent, 2-pinnatisect; primary lateral segments 2-4-paired, dense, 3-5 mm apart; ultimate segments linear-lanceolate or narrowly elliptic. Leaves below synflorescence small. Synflorescence a large, terminal, compound flat-topped panicle. Capitula many. Involucres campanulate, 2.5-3 mm in diam.; phyllaries in 4 rows, scarious margin brown, outer ones ovate or lanceolate, ca. 1.5 mm, abaxially puberulent, middle and inner ones elliptic to oblanceolate or lanceolate, ca. 2.5 mm, abaxially glabrous. Florets yellow, exterior with sessile glands; marginal female florets 4-7, corolla narrowly tubular, apex 3-denticulate; disk florets many, corolla tubular. Achenes ca. 0.8 mm. Fl. and fr. Jul-Sep. 2n = 36*.

● Grasslands, forest margins, on rocks; 2800-4500 m. Gansu, Nei Mongol, Ningxia, Qinghai, Sichuan.