RAMBOLDIA, A NEW GENUS IN THE LICHEN FAMILY LECANORACEAE

The new genus Ramboldia (Lecanoraceae) is described and its affinities to other genera in the family are discussed. Ramboldia is most closel y related to Pyrrhospora, the most obvious difference being the absenc e of anthraquinone pigments in the apothecia of Ramboldia. Five specie s are included in the new genus: the chiefly lignicolous R. stuartii ( Hampe) comb. nov. and R. subnexa (Stirton) comb. nov., the corticolous R. brunneocarpa sp. nov., and the saxicolous R. petraeoides (Nyl. ex Church. Bab. & Mitten) comb. nov and R. plicatula (Mull. Arg.) comb, n ov. Lecidea lampra Stirton is synonymous with R. stuartii, Biatora bys sacea Hampe is not referable to any lichen, and the new combination, M icarea intersociella (Stirton) Coppins, is proposed. Lecidea lampra an d L. subnexa are lectotypified.