The authors describe a new species Botryobasidium robustior, which is the perfect state of Oidium rubiginosum. It was collected in a forest near Mělník, Bohemia, and is similar to B. aureum and B. candicans.
Pouzar Z., Jechová V. (1967): Botryobasidium robustior spec. nov., a perfect state of Oidium rubiginosum (Fr.) linder. – Česká Mykologie 21(2): 69–73.