浙江狗舌草 zhe jiang gou she cao

Senecio pierotii Miquel, Ann. Mus. Bot. Lugduno-Batavi 2: 182. 1866; S. subdentatus Ledebour var. pierotii (Miquel) Cufodontis.

Herbs, rhizomatous. Stem solitary, erect, 50-60 cm tall, rather stout, simple, arachnoid or ± glabrescent. Radical leaves usually present at anthesis, several, rosulate, long petiolate; petiole 4-10 cm, ± winged, at first arachnoid-tomentose, glabrescent, basally expanded; leaf blade oblong, narrowly oblong, or oblanceolate, 12-20 × 1.5-3 cm, papery, both surfaces at first arachnoid-tomentose, later ± glabrescent, pinnately veined, base cuneate or gradually narrowed into petiole, margin mucronulate-dentate or sometimes subentire, apex obtuse to subacute. Stem leaves rather numerous, sessile; lower leaves oblong to oblanceolate, base subamplexicaul; upper leaves gradually smaller upward, lanceolate to linear, base broadly subamplexicaul, apex acuminate; uppermost leaves bractlike, linear or linear-subulate, white arachnoid-tomentose, apex acute. Capitula 2.5-3 cm in diam., usually 6-30 arranged in subumbelliform or umbelliform corymbs; peduncles to 5 cm, sparsely arachnoid or pubescent, basally bracteate, not bracteolate; bracts linear-subulate. Involucres hemispheric, 7-8.5 × 10-14 mm, not calyculate; phyllaries 20-22, broadly lanceolate, ca. 1 mm wide, herbaceous, with membranous margin, sparsely arachnoid or glabrescent, apex acute-acuminate. Ray florets 20-25; corolla tube 4-6 mm; lamina yellow, 7-8 mm, oblong, 4-veined, apically obtuse, 3-denticulate. Disk florets many; corolla yellow, 7-9 mm, with 5-6 mm tube and funnelform limb; lobes ovate-oblong, 1-1.2 mm, apically acute, papillose. Anthers ca. 1.5 mm, basally obtuse. Style branches ca. 1 mm. Achenes cylindric, 2.5-3 mm, glabrous. Pappus white, 7-9 mm. Fl. Apr-May.

Marshes, wet places; 300-500 m. Fujian, Heilongjiang, Jiangsu, Liaoning, Zhejiang [Japan, Korea].