Larry L. St. Clair

Rhizoplaca shushanii is a species of crustose lichen in the family Lecanoraceae.

Rhizoplaca porteri is a species of crustose lichen in the family Lecanoraceae.

Rhizoplaca polymorpha is a species of crustose lichen in the family Lecanoraceae.

Rhizoplaca parilis is a crustose lichen in the family Lecanoraceae. Described in 2011, it was separated from the Rhizoplaca melanophthalma complex after molecular studies showed it forms an independent evolutionary lineage. It typically forms tightly attached, rosette-shaped growths with radiating lobes and a yellow-green surface, often featuring a dark, glossy centre when fruiting bodies are present. R. parilis occurs on exposed siliceous rock from about 2,000 metres up to 3,500 metres in habitats ranging from pinyon–juniper woodland to alpine tundra across North America, Europe, Asia and

Rhizoplaca occulta is a species of crustose lichen in the family Lecanoraceae. The species was described in 2013 after DNA analysis revealed it had long been hidden within the broadly defined species complex based around the widespread Rhizoplaca melanophthalma. Rhizoplaca occulta is a highly variable lichen can form either tightly attached, radiating growths with dark centers or loose, unattached cushions that roll freely on the ground. It is known only from high-elevation sites in Nevada, Idaho, and Utah, where it grows on exposed, calcium-poor rocks, though reliable identification

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