JOHN, V. & HAEDEKE, J. 2012. First record of Multiclavula mucida in Rheinland-Pfalz, with notes on distribution and conservation status of the species. - Herzogia 25: 287-292.
The basidiomycete lichen Multiclavula mucida, reported from an unusually low altitude, is new to Rheinland-Pfalz. Information on the distribution and vulnerability of this species is provided in the lichenological literature, but differs from that in the fungal literature. Following a period of decline, the lichen appears to be spreading; the causes for this are briefly discussed.