马蹄叶橐吾 ma ti ye tuo wu

Plants long yellowish red pilose. Stem erect, to 60 cm tall, ca. 3 mm in diam. at base. Basal leaves petiolate; petiole 7-16 cm, slender, long yellowish red pilose, base narrowly sheathed; leaf blade horseshoe-shaped, 3-20 × 4-9 cm, abaxially densely hairy, adaxially glabrous or sparsely hairy, palmately veined, base deeply cordate, margin regularly dentate and ciliate, apex rounded, triangular-mucronate; sinus ca. 1/2 as long as leaf blade, narrow; basal lobes not divergent, margin laciniate-dentate. Middle to distal stem leaves sessile; sheath enlarged, cymbiform or suborbicular, amplexicaul, margin dentate; leaf blade triangular-reniform, 3-4 cm, to 6 cm wide, apex acute. Synflorescence racemose, short, clustered; leaflike bracts ovate, 1.5-1.8 × ca. 1 cm, margin laciniate-dentate and ciliate; peduncles 3-12 mm. Capitula 5-10; supplementary bracts narrowly ovate, longer than involucre, shortly petiolate, margin laciniate-dentate and ciliate. Involucre narrowly campanulate, ca. 10 × 5 mm, outside glabrous; phyllaries 7 or 8, in 2 rows, narrowly oblong, 2-3 mm wide, apex triangular-acute; inner phyllaries membranous at margin. Ray florets 5, yellow; lamina linear-oblong, 1.3-2 cm × ca. 4 mm, apex obtuse; tube ca. 6 mm. Tubular florets numerous, 11-11.5 mm; tube 5-6 mm. Pappus reddish yellow, ca. 5 mm, shorter than tube of tubular corolla. Fl. Jul-Aug.

● Forest margins, grassy slopes; 2500-2800 m. S Sichuan.