Bulbothrix sipmanii, a new lichen species from Guyana

Abstract

The new species Bulbothrix sipmanii Aptroot & Aubel is described on the basis of a collection from Guyana. It resembles B. schiffneri in having narrow lobes with many branched cilia and coronate apothecia with conspicuously lunate ascospores, but differs by the presence of isidia. It is probably the isidiate counterpart of that species.