Rhizopus spp on Culture and Microscopy A "respiratory" specimen from a recently deceased organ donor. This organ donor culture grew Rhizopus spp. one of the Mucorales zygomycetes. Morphology: unbranched stalks (sporangiophores), with roots (rhizoids) directly underneath. Often shorter, even less-septate hyphae than Mucor Rich Davis, PhD, D(ABMM), MLS @richdavisphd #Rhizopus #Culture #Microscopy #microbiology #clinical