Youngia jiulongensis (Crepidinae, Cichorieae, Asteraceae), a New Species from Sichuan, China

Youngia jiulongensis Y. L. Peng, X. F. Gao & Li Bing Zhang, a new species of Asteraceae from western Sichuan, China, is described. This new species is similar to Y mairei Lev.) Babe. & Stebbins and Y. pilifera C. Shih in having blackish brown achenes, a white pappus, and fewer capitula, but distinct from the latter two in having a taller stature (28-50 cm vs. 8-30 cm), two or three well developed, undivided caudical leaves, sparsely toothed leaf margins, acute leaf apices, long non winged petioles, reduced pubescence on the whole plant, glabrous phyllaries, and midveins of all inner phyllaries plane.