Dermatea Acerina and Pezicula Acericola

Abstract

A cultural and taxonomic study has been made of Pezicula acericola (Peck) Sacc. and Dermatea acerina (Peck) Rehm and their respective conidial stages. Pezicula acericola, with an apparently undescribed species of Cryptosporiopsis as its imperfect stage, is a typical species of Pezicula with oblong-ellipsoid conidia. It is considered distinct from Pezicula carnea (Cooke & Ellis) Rehm, also occurring on species of Acer. Dermatea acerina, with the imperfect stage Sphaeronema acerinum Peck, differs from typical Dermatea species in having oblong-ellipsoid conidia as usually found in Pezicula. Its generic position is discussed but it is retained in the genus Dermatea because of the characters of the perfect stage.