Cystotheca tjibodensis (Erysiphaceae, Ascomycota): rediscovery in Java after 90 years and first finding of anamorph

Cystotheca tjibodensis, formerly known as Lanomyces tjibodensis (Perisporiales), is a fungus found in 1920 in Indonesia. This species, hitherto only known from its type collection, is now regarded as belonging to the Erysiphales. However, molecular data are still required to verify the taxonomic affinity. In March 2011, we rediscovered this fungus at Cibodas Botanical Garden, Java. Detailed characterizations of this tropical powdery mildew are reported in this study based on morphological and molecular examinations. The anamorph of this species that was not found in the type specimen is also reported in this study.