天山千里光 tian shan qian li guang

Senecio acromaculus Y. Ling; S. acromaculus f. elatus Y. Ling; S. drummondii Babu & S. N. Biswas; S. kawaguchii Kitamura.

Herbs, dwarf, rhizomatous. Stems solitary or several fasciculate, ascending or erect, 5-20 cm tall, simple or sometimes branching from base, sparsely arachnoid when young, ± glabrescent. Basal and lower stem leaves mostly present at anthesis, petiolate; blade adaxially green, obovate or spatulate, 4-8 × 0.8-1.5 cm, abaxially ± arachnoid-pubescent and ± glabrescent to glabrous, adaxially subglabrous or glabrous, base attenuate into petiole, margin subentire, shallowly dentate, or pinnatifid, apex obtuse to subacute. Median stem leaves sessile; blade oblong or oblong-linear, 2.5-4 × 0.5-1 cm, pinnately veined, base subamplexicaul, margin shallowly dentate to pinnatifid or rarely pinnatipartite, apex obtuse. Upper leaves smaller, linear or linear-lanceolate, margin ± entire. Capitula radiate, 2-10 in lax terminal corymbs, rarely solitary; peduncles 0.5-2.5 cm, ± arachnoid; bracteoles linear or linear-subulate, 3-5 mm, apically acute. Involucres campanulate, 6-8 × 3-6 mm, calyculate; bracts of calyculus 4-8, 3-5 mm, apically acuminate, often purplish; phyllaries ca. 13, linear-oblong, 6-7 × 1-1.5 mm, usually dark colored and often fimbriate, or villous, herbaceous, sparsely arachnoid, glabrescent, margin scarious, apically acuminate. Ray florets ca. 10; corolla tube ca. 3 mm; lamina yellow, oblong-linear, 5-6 × 1.5-2 mm, 4-veined, apically obtuse, 3-denticulate. Disk florets ca. 26 or 27; corolla yellow, 6-7 mm, with 3-3.5 mm tube and funnelform limb; lobes oblong-lanceolate, ca. 1.2 mm, apically acute, papillose. Anthers linear, ca. 2 mm, basally obtuse-auriculate, appendages ovate-lanceolate; antheropodia balusterform, basally dilated. Style branches ca. 1 mm. Achenes cylindric, 3-3.5 mm, glabrous. Pappus white, ca. 8 mm. Fl. Jul-Sep.

Grassy slopes, open wet places, streamsides; 2400-5000 m. Gansu, Nei Mongol, Qinghai, Sichuan, Xinjiang, Xizang [Kazakhstan, Kyrgyzstan, N Myanmar, Russia].