Rhizopus spp. on microscopy - rhizoids ("roots") immediately below non-branched sporangiophores - most common cause of zyogmyæte infections (but also a common environmental contaminant!) A truly classic-looking Rhizopus spp. from a clinical respiratory specimen: non-branching sporangiophores, (in my experience much shorter than Mucor spp) w/ rhizoids directly beneath them. Rich Davis, PhD, D(ABMM), MLS @richdavisphd #Rhizopus #clinical #microscopy #microbiology