Roc·cel·la
| \ rōˈchelə \
Definition of Roccella
: 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
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“Roccella.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Roccella. Accessed 12 Apr. 2021.
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