Rhizoplaca is a genus of lichenized fungi in the family Lecanoraceae. Members of the genus are commonly called rimmed navel lichensResults for Common Name Rimmed navel lichen, USDA because of their umbilicate growth form and lecanorine (rimmed with thallus-like tissue)apothecia, also rock-posy lichen and rockbright.Field Guide to California Lichens, Stephen Sharnoff, Yale University Press, 2014,
Species , Species Fungorum (in the Catalogue of Life) accepts 17 species of Rhizoplaca: Rhizoplaca arbuscula Rhizoplaca callichroa Rhizoplaca glaucophana Rhizoplaca haydenii Rhizoplaca idahoensis Rhizoplaca melanophthalma Rhizoplaca nigromarginata Rhizoplaca novomexicana Rhizoplaca occulta Rhizoplaca opaca Rhizoplaca ouimetensis Rhizoplaca pachyphylla Rhizoplaca parilis Rhizoplaca polymorpha Rhizoplaca porteri Rhizoplaca shushanii Rhizoplaca weberi
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