柴胡叶垂头菊 chai hu ye chui tou ju

Plants grayish green, mealy. Stem solitary, erect, 20-40 cm tall, 2-3 mm in diam. at base, proximally glabrous, distally black pilose. Basal leaves long petiolate; petiole 5-11 cm, glabrous; leaf blade grayish green, elliptic to oblong, 3.5-11 × 1.5-4.5 cm, glabrous, pinnately veined, base cuneate or subtruncate, margin entire or slightly denticulate, apex rounded or acute. Stem leaves 2-4, sessile, obovate-oblong to oblanceolate, erect, adnate, base amplexicaul. Capitulum solitary, nodding. Involucre black, hemispheric, 7-10 × ca. 15 mm, outside glabrous, base black pilose; phyllaries in 2 rows, 3-7 mm wide, apex acute; outer phyllaries linear to lanceolate; inner phyllaries oblong or oblanceolate, margin membranous. Ray florets yellow; lamina lanceolate, 7-15 × ca. 4 mm, apex acuminate; tube 1.5-2 mm. Tubular florets numerous, yellow, ca. 6 mm; tube ca. 1 mm. Achenes brown, oblong, ca. 4 mm. Pappus absent. Fl. Jun-Aug.

● Grassy slopes, gravelly places; 3500-4100 m. SW Sichuan, SE Xizang, NW Yunnan.