亚东垂头菊 ya dong chui tou ju

Plants gray-green, mealy. Stem solitary, erect, 25-56 cm tall, 2-3 mm in diam. at base, lower part glabrous, upper part brown pilose. Basal leaves petiolate; petiole 1-3 cm, glabrous and mealy, base narrowly sheathing; leaf blade ovate, 3-6 × 2.5-4.5 cm, glabrous, pinnately veined, base cordate, cuneate, margin entire or denticulate, apex obtuse. Stem leaves 1-3, erect, adnate, tubular-amplexicaul. Capitulum solitary, nodding. Involucre hemispherical, 1-1.3 mm, to 2.5 cm wide, outside glabrous, base brown pilose, black-gray when dry; phyllaries 14-20, in 2 rows, oblong or lanceolate, 3-5 mm wide, apex acuminate; inner phyllaries with brown margin. Ray florets yellow; lamina lanceolate, 15-20 × 3-6 mm, apex acuminate; tube ca. 2 mm. Tubular florets numerous, yellow-brown, ca. 7 mm; tube to 1 mm; limb tubular, ca. 2 mm wide. Achenes cylindric, ca. 4 mm. Pappus white, as long as corolla. Fl. Jul, fr. Aug.

● Grassy slopes, alpine meadows; 4000-4800 m. Xizang (Yadong).