下白亚菊 xia bai ya ju

Chrysanthemum hypoleucum (Y. Ling ex C. Shih) H. Ohashi & Yonekura.

Subshrubs, ca. 55 cm tall. Young branches white pubescent. Middle and distal stem leaves: petiole ca. 5 mm; leaf blade ovate, subovate, or ovate-elliptic, 1.2-2.5 × 1.3-2 cm, abaxially gray-white, densely and thickly tomentose, with sessile glands beneath indumentum, adaxially green, glabrous, with sessile glands, pinnately 3-5-paired, base truncate or subtruncate. Leaves below synflorescence similar, but smaller. Synflorescence a terminal flat-topped panicle, 1-5 cm in diam.; synflorescence branches and peduncles white tomentose. Capitula many. Involucres campanulate, ca. 3.5 mm in diam.; phyllaries in 4 rows, straw-colored, glossy, abaxially glabrous, scarious margin hyaline, apex obtuse or rounded, outer ones elliptic, ca. 1 mm, middle and inner ones elliptic to obovate-elliptic, ca. 3 mm. Florets yellow; marginal female florets 5 or 6, corolla narrowly tubular, minutely 3-denticulate; disk florets many, corolla tubular. Achenes ca. 0.6 mm. Fl. and fr. Jul.

● Roadsides; 600-700 m. Gansu, Sichuan.