Contributions to the lichen flora of the Hengduan Mountains, China 1. Genus Pseudephebe (lichenized Ascomycota, Parmeliaceae)

摘要

Pseudephebe pubescens is reported, described and illustrated from the Chinese Hengduan Mountains region. It is characterized by its slender and isotomicdichotomous branched filaments forming tiny cushions, a cortex of longitudinally oriented hyphae that become prosoplectenchymatous at the surface, medullary hyphae that are not ornamented, and the absence of lichen substances. It grows on arctic-alpine rock.