Peliosanthes pachystachya W. H. Chen & Y. M. Shui, a new species of Liliaceae from Luchun County, SE Yunnan, is described and illustrated. The new species is similar to P. sinica Wang & Tang in the stolon with internodes ca. 18 cm long, but different by leaves 9 - 13-nerved I pedicels 9 - 10 mm long, not bracteolate and perianths ovate-triangular. The new species is also similar to P. ophipogonoides Wang & Tang in the ovate-triangular perianths and lanceolate bracts, but different from it in having long stolons, leaves 9 - 13-nerved, pedicels 9 - 10 nun long, scape and inflorescence shorter.