横叶橐吾 heng ye tuo wu

Stem erect, 50-100 cm tall, 6-25 mm in diam. at base, densely shortly rufous pilose. Basal leaves petiolate; petiole to 30 cm, densely shortly rufous pilose, base sheathed; sheath to 11 × ca. 1.5 cm; leaf blade orbicular or orbicular-reniform, 7-24.5 × 11-38 cm, both surfaces shortly pilose, palmately veined, margin denticulate, apex rounded or retuse; sinus ca. 1/3 as long as leaf blade, broad, basal lobes orbicular. Middle stem leaves shortly petiolate or sessile; sheath enlarged, broadly ovate, ca. 5 cm, to 13 cm wide, denticulate; leaf blade smaller, reniform. Distalmost stem leaves only broadly sheathed. Corymbs compound; branches spreading or fasciated, proximal ones to 11 cm. Capitula numerous; leaflike and supplementary bracts linear-subulate; peduncles to 15 mm. Involucre narrowly campanulate, 6-8 × ca. 6 mm, outside glabrous or glabrescent; phyllaries 5-7, oblong or oblong-lanceolate, margin membranous, apex acute. Ray florets 3-6, yellow; lamina narrowly oblong, 3-6 × 1.5-2 mm, apex 2- or 3-denticulate. Tubular florets to 15, ca. 6 mm; tube ca. 2 mm. Pappus white or brown, as long as tube of tubular corolla. Fl. Jun-Jul.

● Stream banks, grassland slopes, alpine grasslands; 3400-4500 m. NW Yunnan.