Rhizoplaca

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