Lecanora carlottiana, a new saxicolous lichen species from the Great Lakes region of North America

Abstract

A species of Lecanora in the L. dispersa group, with a well-developed pale thallus and a heavily pruinose apothecia, resembling superficially among others L. poeltiana, is found on shaded vertical calcareous cliff faces and is described here as Lecanora carlottiana sp. nov. The species is recorded mainly on northern portions of the Niagara Escarpment, as well as from other calcareous rock cliffs on Manitoulin Island, and Algonquin Provincial Park in Ontario, Canada.