Noun | 1. | genus Rhizopogon - a genus of fungi having subterranean sporophores resembling tubers fungus genus - includes lichen genera family Rhizopogonaceae, Rhizopogonaceae - a family of fungi of order Hymenogastrales having round subterranean sporophores Rhizopogon idahoensis - a large whitish Rhizopogon that becomes greyish brown in maturity |