西藏千里光 xi zang qian li guang

Jacobaea tibetica (J. D. Hooker) B. Nordenstam.

Herbs, perennial, rhizomatous. Stems solitary or sometimes 2 or 3, erect, 13-40 cm tall, simple, white arachnoid-tomentose, glabrescent. Basal leaves present at anthesis, long petiolate; blade oblanceolate, 8-10 × 1-1.5 cm, abaxially white tomentose, adaxially sparsely arachnoid, lyrate-pinnatifid, with large ovate-lanceolate, obtuse, irregularly dentate terminal lobe and several short, irregularly incised lateral lobes. Median stem leaves sessile, narrowly oblong-lanceolate, pinnatifid, basally auriculate and subamplexicaul. Upper leaves smaller, linear-lanceolate to linear, apically acuminate. Capitula radiate, 2-6 in a lax terminal corymb, long pedunculate; peduncles 2-7 cm, stout, sparsely to densely arachnoid-tomentose, basally bracteate, with 2 or 3 linear-subulate bracteoles. Involucres campanulate, ca. 8 × 6-8 mm, calyculate; bracts of calyculus 6-8, subulate, 1/3-1/2 as long as involucre; phyllaries ca. 20, linear-lanceolate, ca. 1.5 mm, herbaceous, densely tomentose, 3-veined, margin broadly scarious, apically acuminate and pubescent. Ray florets 16-21; corolla tube ca. 4 mm; lamina yellow, oblong, 10-11 × ca. 2.5 mm, 4- or 5-veined, apically 3-denticulate. Disk florets many; corolla yellow, ca. 8 mm, with ca. 3 mm tube and funnelform limb; lobes ovate-triangular, ca. 1 mm, apically acute, papillose. Anthers ca. 2.7 mm, basally obtuse-auriculate, appendages ovate-lanceolate; antheropodia robust, basally distinctly dilated. Style branches ca. 1 mm. Achenes cylindric, ca. 2.5 mm, glabrous. Pappus white, ca. 7 mm, present on all achenes. Fl. Jul-Sep.

Alpine meadows; 3000-3900 m. ?SW Xinjiang [Pakistan].

This taxon has not yet been recorded for China but may well occur in SW Xinjiang (Karakorum Shan).