齿裂蒲儿根 chi lie pu er gen

Herbs, rhizomatous, with leafy stems. Stems solitary, erect, 35-140 cm tall, simple, sparsely puberulent below, glabrous in upper part. Radical leaves withered by anthesis, long petiolate; blade reniform, 4-14 × 6-17 cm, abaxially sparsely white pilose on veins, palmately 5-7-veined, base deeply cordate, margin subentire or 5-7-denticulate. Median and upper leaves similar to lower ones, but smaller, petioles basally auriculate; uppermost small and bractiform, lanceolate. Capitula 1-1.5 cm in diam., 8 to many, arranged in terminal subumbelliform corymbs; peduncles 2-3 cm, slender, sparsely puberulent or subglabrous, 1-bracteate. Involucres campanulate, 5-7 × 5-7 mm; phyllaries ca. 12, lanceolate or broadly lanceolate, 5-7 × 1-2 mm, glabrous, 1- or 2-veined, apically acuminate and ciliate. Ray florets 8-12; corolla tube ca. 2 mm; lamina yellow, oblong or linear-oblong, 7-9 × 1.5-2.5 mm, 4-7-veined, apically denticulate. Disk florets numerous; corolla yellow, 4-6 mm, with 2.5-3.5 mm tube and campanulate limb; lobes ovate-lanceolate, glabrous, apically acute. Anthers oblong, ca. 1.3 mm, basally obtuse. Style branches recurved. Achenes cylindric, ca. 2 mm, smooth, glabrous. Pappus white, 3.5-4 mm. Fl. May-Jun, fr. Jun-Jul. 2n = 48*.

● Ravines, wet places; ca. 1500 m. Sichuan (Xuyong).

In the protologue of Sinosenecio denticulatus, the petioles were described as being exauriculate and the ray floret laminae as being 7-veined. However, the petioles are actually auriculate at the base, and the ray floret laminae are 4-7-veined.