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

48. Senecio nudicaulis Buchanan-Hamilton ex D. Don, Prodr. Fl. Nepal. 178. 1825.

裸茎千里光 luo jing qian li guang

Jacobaea nudicaulis (Buchanan-Hamilton ex D. Don) B. Nordenstam; Senecio blattariifolius Franchet; S. esquirolii H. Léveillé; S. pallens Wallich ex Candolle; S. rosulifer H. Léveillé & Vaniot; S. yunnanensis Franchet (1894), not Franchet (1893).

Herbs, perennial, ± subscapigerous, rhizomatous. Stems solitary or 2 or 3-fasciculate, erect, 30-70 cm tall, simple. Basal leaves rosulate, sessile, oblong-obovate, 3-18 × 1-6 cm, abaxially sparsely arachnoid, glabrescent to glabrous and sometimes purplish, pinnately veined, lateral veins 10-14, midvein and main veins rather prominent abaxially, attenuate to base, margin subentire or crenate-serrate, apically obtuse or rounded. Stem leaves few, usually 3-5, sessile; blade oblong or oblanceolate-oblong, 2-4 × 0.5-1.5 cm, base expanded, auriculate and subamplexicaul, margin crenate-dentate to lobulate, apex obtuse. Capitula radiate, few to many in terminal compound corymbs; peduncles 1-2.5 cm, sparsely arachnoid or puberulent, bracteate, with 1-3 linear bracteoles. Involucres broadly campanulate, 5-6 × 3-6 mm, calyculate; bracts of calyculus 4 or 5, linear-subulate, 2-3 mm, herbaceous, sparsely arachnoid or subglabrous, 3-veined, margin broadly scarious, apically acute and puberulent. Ray florets 13; corolla tube ca. 4 mm; lamina yellow, oblong, ca. 10 × 2-2.5 mm, 4-veined, apically 3-denticulate. Disk florets many; corolla yellow, ca. 6 mm, with ca. 2.5 mm tube and funnelform limb; lobes ovate-triangular, ca. 0.8 mm, apically acute. Anthers ca. 1.8 mm, basally obtusely to subacutely auriculate, appendages ovate-oblong; antheropodia rather short, basally distinctly dilated. Achenes cylindric, ca. 2 mm, pubescent. Pappus whitish, ca. 5 mm. Fl. Mar-Apr.

Forests, grassy slopes; 1500-1900 m. Guizhou, Sichuan, Yunnan [Bhutan, India, Kashmir, Myanmar, Nepal, Pakistan].


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