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

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.