Polypores from Altay and Tian Mts. in Xinjiang, northwest China

103 polypores based on about 300 collections with their hosts are reported from the Altay and Tianshan in Xinjiang Autonomous Region of northwest China. Most of species are new to Xinjiang. Polyporus xinjiangensis is redescribed and illustrated based on a new record of this species, previously known only from the type specimen, which is sterile.