Skip to main content
Rhizoctonia
1 species
Rhizoctonia is the type and dominant genus of the family Ceratobasidiaceae following recent taxonomic consolidation. Historically treated as a form genus for sterile mycelia, it now encompasses the teleomorphic (sexual) stages formerly known as Thanatephorus (e.g., T. cucumeris) and many species of Ceratobasidium (e.g., C. cornigerum). The genus is characterized by its distinct mycelial features and includes saprotrophs, orchid mycorrhizal symbionts, and destructive plant pathogens.
Key diagnostic features include hyphae with right-angle branching, a constriction at the branch base, and the formation of a septum near the branch origin. Cells are often multinucleate (e.g., R. solani complex) or binucleate (formerly Ceratobasidium anamorphs). Basidiocarps, when formed (formerly Thanatephorus), are effused, web-like, and produce basidia on cymose branches. Sclerotia are frequently produced in culture and nature.
Never eat a wild mushroom based on a web page — confirm with an expert.
Mycology is an evolving science: names, classifications and safety information change as research advances. Entries are compiled from cited sources and reviewed, but may be incomplete or out of date — check the sources, and never rely on this library alone to identify or eat a mushroom.
Join WeMush to browse species, discover strains, and start your cultivation journey.
