The author describes three new species of saprophytic Hyphomycetes in the genus Oidium Link ex Fr. emend. Linder, whose perfect states belong to the genus Botryobasidium. Oidium ellipsosporum sp. nov. and Oidium medium sp. nov. were found in Bohemia; Oidium caribense sp. nov. was found in Cuba. One new combination Oidium capitatum is proposed. A key to species in Czechoslovakia and notes on type revision are included.
Holubová-Jechová V. (1969): New species of the genus Oidium Link ex Fr. emend. Linder. – Česká Mykologie 23(4): 209–221.