A new hairy species of Leptogium (Collemataceae) from China

This paper describes Leptogium weii sp. nov., a new hairy species from Sichuan, southwestern China. Leptogium weii has dense white tomentum on apothecial stalks and thalline margins. It closely resembles L. burnetiae in external morphology but differs in having globose isidia on the upper surface and dense tomentum on the apothecial stalk and thalline margin. A key is given to hairy species with tomentose apothecia.