Lectotypification of Umbilicaria torrefacta (Lightf. ) Schrad.

Contributions to the Ontario flora of lichens and allied fungi, with emphasis on the Great Lakes Basin

“…Umbilicaria torrefacta 1s considered rare elsewhere in the Great Lakes Basin (Fryday & Wetmore 2002, MDNR 2018. It can be distinguished from other species of Umbilicaria in Ontario by the combination of its non-pruinose umbilicate, monophyllous thallus with margins that are finely dissected to perforate, that coalesce into deep groves giving it vernacular names such as 'punctured rocktripe' or 'perforated rocktripe', and a light or dark brown lower surface with distinct trabeculae, lamellae radiating from the umbilicus, and scattered or dense rhizinomorphs (Hestmark 2017, Hinds & Hinds 2007.…”