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

22. Senecio atrofuscus Grierson, Notes Roy. Bot. Gard. Edinburgh. 22: 433. 1958.

黑褐千里光 hei he qian li guang

Herbs, slender, rhizomatous. Stem solitary, erect, 35-65 cm tall, simple, glabrous. Basal and lower stem leaves mostly present at anthesis; petiole to 15 cm, slender, basally expanded; blade ovate or ovate-oblong, 1-4 × 1-1.5 cm, membranous, minutely glandular ciliate on margin, otherwise glabrous, pinnately veined, base cordate to truncate or cuneate, margin remotely apiculate-denticulate, apex obtuse to acute. Median stem leaves sessile; blade oblong or oblong-lanceolate, 3-6(-8) × 0.5-1.5 cm, base cuneate, apex acute. Upper leaves linear, basally subamplexicaul, margin mucronulate-dentate or subentire, apically acuminate or acute. Capitula 1-3, terminal, lax, nodding, 2-2.5 cm in diam.; peduncles 1.5-3.5 cm, sparsely arachnoid to subglabrous; bracteoles 1 or 2, linear. Involucres broadly campanulate, 6-8 × 6-10 mm, calyculate; bracts of calyculus 9-12, linear or linear-subulate, 4-5 mm, purple, sparsely arachnoid or glabrous, ciliate on margin, apically acute; phyllaries ca. 17, ca. 2 mm wide, subleathery, blackish on veins and upper margins, sparsely fuscous pubescent at base, 3-veined, margin narrowly scarious, apically acute and ciliate. Ray florets 18; corolla tube ca. 3 mm; lamina yellow, elliptic, 10-11 × ca. 4 mm, 4-veined, apically acute, 3-denticulate. Disk florets many; corolla yellow, 7-7.5 mm, with ca. 2.5 mm tube and funnelform limb; lobes ovate-triangular, ca. 1 mm, apically blackish, acute. Anthers ca. 2.2 mm, basally shortly obtuse-auriculate, appendages lanceolate; antheropodia elongated, robust, basally slightly dilated. Style branches ca. 1.5 mm. Achenes cylindric, ca. 3.5 mm, glabrous. Pappus white, 7-7.5 mm. Fl. Aug.

● Grassy slopes; ca. 3900 m. Xizang (Gongbo’gyamda), NW Yunnan.


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