Studies on the Genus Phycomyces

Abstract
The genus Phycomyces has been reviewed and revised taxonomically. It has been found to comprise the three species, P. nitens Kunze, P. blakesleeanus Burgeff, and P. microsporus Van Tieghem. P. spinulosus Morini is treated as a doubtful species, and P. pirottianus is reduced to synonymy with P. nitens. Descriptions and synonymy are presented, as are the results of numerous mating experiments with strains of P. nitens subjected to various experimental conditions.