FELLHANERA VIRIDISOREDIATA, A NEW SOREDIATE SPECIES FROM SHELTERED TREES AND SHRUBS IN WESTERN-EUROPE

Fellhanera viridisorediata Aptroot, Brand and Spier, a corticolous sor ediate species commonly found sterile, is described from fertile mater ial on Juglans glabra in the Netherlands. It was also found with apoth ecia on, for example, twigs of Vaccinium myrtillus, Lonicera, and othe r trees. It seems to be common and rapidly spreading in sheltered habi tats in Belgium, Germany and the Netherlands, also occasionally on woo d, roofs, granite and brick. It is close to other Fellhanera species, especially F-seroexpectata and F-viridis, but it differs in the paler soredia, smaller, 1-septate and constricted ascospores and the presenc e of roccellic acid.