黑穗橐吾 hei sui tuo wu

Stem scapelike, erect, 55-120 cm tall, white lanate, to 1 cm in diam. at base, with a dense longer white lanate circle. Leaves all basal, petiolate; petiole 15-23 cm, base white lanate sheathed, distally narrowly winged; leaf blade ovate-oblong, 19-23 × 12-18 cm, glabrescent, pinnately veined, base cordate or rarely subtruncate, abruptly narrowed into a petiole, margin undulately dentate, apex obtuse, mucronate. Scape with a linear bracteal leaf. Synflorescence paniculate-racemose, to 50 cm, densely white lanate; leaflike and supplementary bracts longer, to 3.5 cm, narrower, white lanate; peduncles slender, proximal ones with 7 capitula. Capitula numerous. Involucre narrowly campanulate, 6-8 × ca. 5 mm, outside white puberulent; phyllaries 7 or 8, in 2 rows, oblong, 1.5-3 mm wide, apex triangular, obtuse; inner phyllaries brown membranous at margin. Ray florets yellow; lamina oblong, to 8 × 2-3 mm. Tubular florets numerous, 7-8 mm; tube ca. 1/4 as long as limb. Pappus white, as long as tubular corolla. Fl. Jul, fr. Aug.

● Wet scrub; 3200-4300 m. SW Sichuan.