Rhizoplaca
Introduction '''''Rhizoplaca''''' is a genus of lichenized fungi in the  family Lecanoraceae. Members of the genus are commonly called '''rimmed navel lichens''' because of their umbilicate growth form and lecanorine (rimmed with thallus-like tissue)apothecia, also '''rock-posy lichen''' and '''rockbright'''.
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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