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FOC | Family List | FOC Vol. 20-21 | Asteraceae | Senecio

28. Senecio megalanthus Y. L. Chen, Acta Phytotax. Sin. 26: 57. 1988.

大花千里光 da hua qian li guang

Herbs, perennial, rhizomatous. Rhizomes shorter. Stem erect or rather flexuous at base, 5-15 cm tall, slender, simple, white arachnoid or sometimes glabrate. Basal and lower leaves present at anthesis, long petiolate; petiole slightly expanded, but not amplexicaul; blade adaxially green, ovate or obovate, rarely spatulate or suborbicular, 1.5-4 × 1-1.7 cm, abaxially densely white arachnoid, adaxially sparsely arachnoid or ± glabrous, lateral veins 4-6-paired, inconspicuous, base cuneate-attenuate into petiole 1.5-3 cm, margin subentire or undulate-dentate, apex obtuse or rounded, rarely rather acute. Median stem leaves subsessile or shortly petiolate; blade oblong or oblong-spatulate, 2-4 × 5-8 cm, base cuneate, slightly expanded and amplexicaul, margin subentire or inconspicuously dentate, apex obtuse or slightly acute. Uppermost leaves smaller, bractlike, linear, 5-10 mm. Capitula solitary, terminal, erect or nodding, subsessile or shortly pedunculate. Involucres campanulate or campanulate-subglobose, 10-13 × 15-20 mm, basally 10-13 linear-lanceolate bracteolate; bracteoles 5-7 mm, sparsely arachnoid or glabrescent, margin brown scarious-fimbriate, apically acuminate; phyllaries 21-23, linear-lanceolate, 10-11 × 1-1.5 mm, herbaceous, puberulent or glabrous, margin narrowly scarious, apically purplish and puberulent. Ray florets 10-13; corolla tube 3.5-4 mm; lamina yellow, oblong, 10-11 × 2.5-3 mm, 4-veined, apically 3-denticulate. Disk florets many; corolla yellow, 8-9 mm, with ca. 3 mm tube and narrowly funnelform limb; lobes triangular-ovate, apically acute, puberulent. Anthers linear, basally obtuse. Style branches obtuse, papillose. Achenes cylindric, 2-2.5 mm, glabrous. Pappus white, 10-11 mm.

● Alpine rocky slopes; 4100-4800 m. Sichuan (Kangding, Xiangcheng).


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