Abstract Alien tree species have been introduced to Europe and often used as roadside trees. Currently, preference is given that are adapted urban climate drier conditions. Native epiphytic lichens local species; however, little known whether a shift toward more alien trees would affect the diversity of within cities. We considered three genera common in Hamburg (Germany) Acer, Tilia, Quercus, ...

Mycosphaerella punctiformis, the type species of the genus Mycosphaerella, is epitypified by material collected on Quercus robur in The Netherlands. The teleomorph is described in planta, and the Ramularia anamorph, for which the new name R. endophylla is proposed, and the Asteromella spermatial state are characterized in vitro. Sequence data of the nuclear ribosomal DNA are presented and analy...