天山还阳参 tian shan huan yang shen

Pseudoyoungia tianshanica (C. Shih) D. Maity & Maiti; Tibetoseris tianshanica (C. Shih) Tzvelev.

Herbs 3-5 cm tall, perennial. Stem erect or ascending-erect, pubescent, leafy. Leaves oblanceolate, 2.5-4 × 0.5-0.8 cm, lyrately pinnatipartite to pinnatisect, both faces sparsely pubescent or abaxially glabrous, base attenuate or abruptly narrowed into a petiole-like portion; lateral lobes 3 or 4 pairs, triangular, rhomboid, or irregularly rhomboid, margin entire, apex acute, obtuse, or rounded; terminal lobe elliptic, ovate, hastate, or sagittate, apex obtuse to acute. Capitula 2, terminal. Involucre cylindric to narrowly campanulate, ca. 1.2 cm. Phyllaries dark, abaxially sparsely arachnoid hairy and with blackish multicellular hairs on midvein; outer phyllaries narrowly elliptic-lanceolate, longest more than 1/2 as long as inner ones, apex acute; inner phyllaries adaxially glabrous, apex acute to obtuse. Achene not seen when mature. Pappus white, ca. 4 mm. Fl. Jul.

● Mountain slopes; ca. 2600 m. Xinjiang (Tian Shan).

Crepis tianshanica is an insufficiently known species due to the lack of mature achenes in the single collection known. For the time being, we follow the generic assignment to Crepis by Sennikov (Byull. Moskovsk. Obshch. Isp. Prir., Otd. Biol. 105: 66-69. 2000), rather than to Askellia ("ex affinitate C. flexuosae," C. Shih, Acta Phytotax. Sin. 33: 190. 1995) or Youngia (D. Maity & Maity, Compositae Newslett. 48: 33. 2010, under Pseudoyoungia).