耳叶蟹甲草 er ye xie jia cao

Cacalia auriculata Candolle, Prodr. 6: 329. 1838; C. auriculata var. ochotensis (Maximowicz) Komarov; Hasteola auriculata (Candolle) Pojarkova; Koyamacalia auriculata (Candolle) H. Robinson & Brettell; Senecio dahuricus Schultz Bipontinus; S. dahuricus var. ochotensis Maximowicz.

Rhizomes procumbent, with numerous fibrous roots. Stem solitary, erect or often curved, 30-100 cm or taller, sulcate, glabrous. Radical leaves withered often by anthesis; stem leaves 4-6, thinly papery; lower leaf petiole 1.5-2(-3) × as long as blade, slender, expanded at base only, but without auricle. Lower stem leaves 1 or 2; blade reniform, 2-4 × 4-7 cm, margin with unequally sized large teeth, apex contracted and long acute or sometimes slightly retuse. Median stem leaf petiole equal to blade or 1/4-1/2 as long, basally usually expanded into a small auricle; blade reniform to triangular-reniform, 5-16 × 7-14 cm, margin with equal large teeth or teeth retuse or indistinctly toothed near base, rarely entire, apex deeply retuse or retuse, often angulate, sometimes long acuminate. Upper leaves same shape as median leaves but smaller, triangular or oblong-ovate, shortly petiolate; uppermost leaves lanceolate. Capitula very numerous, terminal, arranged in 4.5-15 cm, narrow racemes, rarely shortly branched in lower part, or few racemose; peduncles pendulous, 1.5-5 mm or 7-9 mm in lower part, slender, glandular hairy and puberulent, with setiform or lanceolate bractlets; bractlets ca. 2 mm. Involucres purple or purple-green to green, cylindric; phyllaries 5, rarely 4, oblong, 4-8 mm, outside subglabrous, apically slightly acute. Florets 4-7; corolla yellow, 6-8 mm; tube as long as limb. Anthers exserted from corollas, basally sagittate. Style branches apically truncate, papillose. Achenes yellowish, cylindric, 3.5-5 mm, glabrous, ribbed. Pappus white, ca. 7 mm. Fl. Jun-Jul, fr. Sep.

Forest understories, forest margins; 1400-1600 m. Heilongjiang, Jilin, Nei Mongol [N Japan, N Korea, Russia (Far East)].