Colonies growing rapidly, cream to pinkish or red-brown. Conidiophores ± erect, verticillately branched. Conidiogenous cells in clusters of up to 5, narrow, tapering, producing conidia successively from single apical conidiogenous loci. Conidia ellipsoidal to cylindrical, hyaline, aseptate. Resting spores produced from the ends of vegetative hyphae, two-celled, the basal cell ± hyaline and smooth-walled, the apical cell large, ± globose, thick-walled, pigmented, warty.
No teleomorphs are known for Mycogone, but the form-genus has clear links to the Clavicipitales, some species producing Verticillium-like conidiophores as well as thick-walled resting spores.
Mycogone perniciosa (Magn.) Delacr. and Mycogone rosea Link cause the “wet bubble” diseases of cultivated mushrooms (Brady & Gibson, 1976 b, c). Mycogone perniciosa has pinkish colonies, pale brown resting-spores, and produces Verticillium-like conidiophores and conidia. Mycone rosea has reddish brown colonies, strongly pigmented resting spores and lacks a Verticillium-like morph.