(from the article `Parmelia`) largest genus of foliose (leafy) lichens, which includes among its members the species commonly known as crottle and skull lichen. Crottle, the ... Found on http://www.britannica.com/eb/a-z/c/162
Synonym for cudbear ... Purple-red colouring agent derived from the lichen Ochrolechia tartarea (family Lecanoraceae) and for the colouring principles from Roccellaceae used for colouring liquid pharmaceutical preparations. ... Synonym: crottle. ... (05 Mar 2000) ... Found on http://www.encyclo.co.uk/local/20973