三角叶蟹甲草 san jiao ye xie jia cao

Senecio deltophyllus Maximowicz, Bull. Acad. Imp. Sci. Saint-Pétersbourg 27: 487. 1882; Cacalia deltophylla (Maximowicz) Mattfeld ex Rehder & Kobuski; Koyamacalia deltophylla (Maximowicz) H. Robinson & Brettell.

Rhizomes robust, elongate with numerous fibrous roots. Stem solitary, erect, 50-80 cm tall, distinctly sulcate, sparsely pubescent or subglabrous. Leaves petiolate; lower leaves withered and fallen; petiole 3-6 cm, not winged, white crisped- and glandular hairy. Median leaves triangular, 4-10 × 5-7 cm, abaxially sparsely puberulent, adaxially glabrous, basally 3-5-veined, lateral veins upward divaricate, base truncate or cuneate, margin irregularly undulate-toothed, teeth obtuse and mucronulate, apex acute. Upper leaves shortly petiolate, lanceolate. Capitula few to 10, pendulous, terminal or in upper leaf axils, corymbose; peduncles 1-3 cm, sparsely crisped- and glandular hairy; bracteoles 3-8, linear. Involucres campanulate, 6-8 × 5-10 mm; phyllaries 8-10, oblong, ca. 8 × 2-3 mm, outside sparsely white pubescent and glandular hairy, barbate, with broad scabrous margins, apex acuminate. Florets numerous (ca. 38); corolla yellow or yellow-brown, 5-7 mm, with ca. 3 mm tube and campanulate limb; lobes lanceolate, apex puberulent. Anthers caudate at base. Style branches finely long excurved, apex truncate, long papillose. Achenes cylindric, 3-4 mm, glabrous, ribbed. Pappus white, 6-7 mm. Fl. Jul-Aug, fr. Sep.

● Forest understories, slopes, thickets in valleys, shaded places; 3100-4000 m. Gansu, Qinghai, N Sichuan.