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

20. Senecio arachnanthus Franchet, J. Bot. (Morot). 8: 355. 1894.

长舌千里光 chang she qian li guang

Cacalia arachnantha (Franchet) Handel-Mazzetti.

Herbs, perennial, rhizomatous. Stem solitary, erect, to 100 cm tall, not branched below synflorescence, puberulent when young. Leaves long petiolate, basal and lower stem leaves withered by anthesis; petiole to 24 cm, not winged, sparsely pubescent; blade broadly ovate, to 26 cm long and broad, membranous or thinly papery, abaxially sparsely shortly pilose, adaxially minutely pubescent on veins, pinnately veined, base deeply cordate or hastate, margin acutely irregularly coarsely dentate, apex acuminate-attenuate or acute. Median and upper stem leaves broadly triangular, basally broadly cordate, with shorter petioles not winged or winged and expanded and subamplexicaul. Uppermost leaves ovate-triangular or ovate-lanceolate, basally cuneate, shortly petiolate or subsessile. Capitula radiate, rather few to numerous, arranged in long stalked terminal compound corymbs; peduncles 6-10 mm, bracteate; bracteoles 3, linear, 5-10 mm, pubescent. Involucres cylindric, 8-10 × 3-5 mm, calyculate; bracts of calyculus 6-8, green, linear, ca. 1/3 as long as involucre; phyllaries 10-13, linear-lanceolate, ca. 8 × 1.5-2 mm, leathery, glabrous, margin narrowly scarious, apically obtuse to acute and finely ciliate. Ray florets 4; corolla tube ca. 7 mm, puberulent in upper part; lamina yellow, linear, 20-22 × 0.5-0.7 mm, 2- or 3-veined, apically 3-denticulate. Disk florets 17-19; corolla yellow, ca. 10 mm, with 5.5-6 mm tube and funnelform limb; lobes ovate-oblong, ca. 1.5 mm, apically acute, papillose. Anthers ca. 3.5 mm, basally obtuse-auriculate, appendages ovate-lanceolate; antheropodia rather broad, basally slightly expanded. Style branches ca. 1.2 mm. Achenes cylindric, ca. 3 mm, glabrous. Pappus white, ca. 2 mm. Fl. Aug-Sep.

● Wet places in forests, by springs, streams; ca. 3000 m. NW Yunnan (Dali, Heqing).


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