Coenocytic hyphae composed of multinucleate, nonseptate filaments; produces stalked sporangia which are very conspicuous in the ubiquitous black bread mold (Rhizopus nigricans).
Left: A white fungus colony resembling a Greek letter growing on wet green moss. The colony is about one inch (2.5 cm) in diameter. Right: Magnified view of the fungus (200x) showing silvery-white hyphae bearing stalked mitosporangia. Each mitosporangium bears many mitospores. These fungi are sometimes called "pin molds" because of the resemblance of the stalked mitosporangia to round-headed pins. They belong to the family Mucoraceae in the fungal division Zygomycota.