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

50. Senecio argunensis Turczaninow, Bull. Soc. Imp. Naturalistes Moscou. 20(2): 18. 1847.

额河千里光 e he qian li guang

Jacobaea argunensis (Turczaninow) B. Nordenstam; Senecio argunensis f. angustifolius Komarov; S. argunensis var. blinii (H. Léveillé) Handel-Mazzetti; S. argunensis f. latifolius Komarov; S. blinii H. Léveillé; S. erucifolius Linnaeus subsp. argunensis (Turczaninow) E. Wiebe; S. jacobaea Linnaeus var. grandiflorus Turczaninow ex Candolle.

Herbs, perennial, rhizomatous. Stem solitary, erect, 30-60(-80) cm tall, arachnoid-pubescent, sometimes ± glabrescent, branching into synflorescence. Basal and lower stem leaves withered and usually shed by anthesis; median stem leaves rather crowded, sessile; blade ovate-oblong to oblong, 6-10 × 3-6 cm, papery, abaxially sparsely arachnoid and ± glabrescent, adaxially glabrous, base narrowly auriculate or laciniate-auriculate, pinnatisect to pinnatipartite with small indistinct terminal lobe and ca. 12 narrowly lanceolate or linear, 1-2.5 × 0.1-0.5 cm, apically obtuse to acute, marginally 1- or 2-dentate or narrowly lobulate or entire somewhat ascending lateral lobes. Upper leaves smaller and apically more attenuate, otherwise similar. Capitula radiate, numerous, arranged in terminal compound corymbs; peduncles 1-2.5 cm, slender, sparsely to densely arachnoid, bracteate, with a few linear-subulate, 3-5 mm, acuminate bracteoles. Involucres subcampanulate, 5-6 × 6-7 mm, calyculate; bracts of calyculus ca. 10, linear, 3-5 mm; phyllaries ca. 13, green or sometimes purplish, oblong-lanceolate, 1-1.5 mm, herbaceous, sparsely arachnoid, margin broadly scarious, apically acuminate or acute and shortly bearded. Ray florets 10-13; corolla tube ca. 4 mm; lamina yellow, oblong-linear, 8-9 × 2-3 mm, 4-veined, apically obtuse, 3-denticulate. Disk florets many; corolla yellow, ca. 6 mm, with 2-2.5 mm tube and funnelform limb; lobes ovate-oblong, ca. 0.7 mm, apically acute. Anthers ca. 2 mm, basally distinctly subacutely auriculate, appendages ovate-lanceolate; antheropodia rather stout, basally dilated. Style branches ca. 0.7 mm. Achenes cylindric, ca. 2.5 mm, glabrous. Pappus whitish, ca. 5.5 mm. Fl. Aug-Oct.

Montane meadows, grassy slopes; 500-3300 m. Anhui, Gansu, Hebei, Heilongjiang, Henan, Hubei, Jiangsu, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shanxi, Sichuan [Japan, Korea, Mongolia, Russia (Far East, SE Siberia)].


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