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

59. Senecio desfontainei Druce, List Brit. Pl. 2: 61. 1928.

苞叶千里光 bao ye qian li guang

Senecio coronopifolius Desfontaines, Fl. Atlant. 2: 273. 1799, not N. L. Burman (1768); S. glaucus Linnaeus subsp. coronopifolius Alexander.

Herbs, annual. Stems erect or subdecumbent, 10-25 cm tall, usually branched from base or middle; branches erect or divaricate-ascending, glabrous or sparsely pubescent or pubescent only in leaf axils. Leaves sessile; blade oblong, 1.5-4 × 0.5-1.5 cm, glabrous or sparsely pubescent at least on midvein abaxially, pinnatifid to pinnatisect with 6-8 oblong or oblong-linear, entire or 1- or 2-denticulate lateral lobes, apex obtuse; lower leaves attenuate into a petioloid base, upper ones auriculate and semiamplexicaul at base. Uppermost leaves oblong-linear or linear, pinnatifid or dentate. Capitula radiate, few to rarely many, terminal, laxly corymbose; peduncles 1-3 cm, sparsely pubescent or glabrous, with a few linear-subulate bracteoles. Involucres narrowly campanulate, 4-5 × 2-4 mm, calyculate; bracts of calyculus 8-10, linear-subulate, blackish tipped; phyllaries 15-20, linear-lanceolate, ca. 0.5 mm wide, herbaceous, glabrous, apically acute and sparsely shortly puberulent. Ray florets 8-12; corolla tube ca. 3 mm; lamina yellow, elliptic-oblong, ca. 6 × 2.5-3 mm, 4-veined, apically obtuse, 3-denticulate, becoming revolute. Disk florets many; corolla yellow, ca. 5.5 mm, with 2-2.5 mm tube and funnelform limb; lobes ovate-triangular, ca. 0.7 mm, apically acute. Anthers ca. 1.8 mm, basally distinctly obtuse-auriculate, appendages ovate; antheropodia distinctly dilated at base. Style branches ca. 0.5 mm. Achenes cylindric, ca. 3 mm, shortly adpressed pubescent. Pappus white, ca. 4.5 mm. Fl. Jul-Aug. 2n = 20.

Gravelly places by streams; 3100-4600 m. Xizang (Ngari) [NW India, Kashmir; N Africa, SW Asia, Macaronesia (Canary Islands)].


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