Waynea hirsuta, a new epiphytic lichen species from Central Siberia

A new lichen, Waynea hirsuta is described from the Tunkinsky range, Lake Bajkal region, Central Siberia. It has a squamulose, sorediate thallus, (0-) 1 (-3) septate spores, labriform soralia, and positive reactions to K and to N of epithecium, excipulum and upper cortex. The thalline squamules have a dense cover of hyaline hairs. The material was collected on the bark of old Populus balsamifera trees in a close stand of Pinus sibirica. The affinities with the other three species of the genus, and with some Hypocenomyce species are discussed.