The genus Mucor can be differentiated from Absidia,Rhizomucor and Rhizopus by the absence of stolons and rhizoids. Colonies are very fast growing, Cottony tofluffy,white to yellow,becoming dark-grey,with the development of sporangia. Sporangiophores are erect, simple or branched,forming large,terminal,globose to spherical, multispored sporangia, without apophyses and with well-developed subtending columellae. A conspicuous collarette(remnants of the sporangial wall) is usually visible at the base of the columella after sporangiospore dispersal.Sporangiospores are hyaline,grey or brownish ,globose to ellipsoidal,and smooth-walled or finely ornamented. Chlamydospores and zygospores may also be present.