No abstract

The depsidones dechloropannarin (I), isovicanicin (11) and allorhizin (16) have been isolated from Psoroma lichens and the structures confirmed by synthesis.

Lichens f r om Terra Diemen (Tasmania) collected in 1792-93 by J.-1. H. Labillardierc and now held in the Philip Barker Webb herbarium in Florence (Fl-W) number 21 species in 13 genera preserved on 19 herbarium sheets. These include holotype and isotype material of Baeomyces reteporus Labill. [ = C/adia retipora (Labill.) Ny!.], isolectotype material of Stiel a hillardiere Dclise [ = Pseudocyphellaria hillardierei (Delise) Rasanen) and tax a from the following genera: Baeomyces,