Roccella
noun
Roc·cel·la
rōˈchelə
: a genus (the type of the family Roccellaceae) of chiefly maritime rock-inhabiting lichens that have a fruticulose or pendulous thallus and include some (especially Roccella tinctoria) which are the chief sources of the dye archil and some which furnish litmus compare lecanora, pertusaria
roccelline
adjective
-elə̇n
-eˌlīn
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Merriam-Webster unabridged
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