lichen-Usnea subscabrosa

Usnea subscabrosa

Usnea subscabrosa

Usnea subscabrosa photo by Bob Klips

DIAGNOSTIC FEATURES: Very thick, hard cortex; isidia in small circular patches, medula K-, found on rock (at least in Ohio); compare with U. amblyoclada also found on rock but more shrubby and less pendant, K+ yellow turning red, and with U. mutabilis reddish medula.

ECOLOGY: General distribution is the southeastern US, extending into New Englan, usually growing on bark, more rarely on rock; recently found at several locations in Jackson County, growing on sandstone.

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