On some of the rugged masses of masonry grew large hoary tufts of the strange roccella or orchil-weed, which yields the famous purple dye -- with which, in all likelihood, the robes of the Cæsars were coloured -- and which gave wealth, rank, and name to one princely. From Wordnik.com. [Roman Mosaics Or, Studies in Rome and Its Neighbourhood] Reference
A great quantity of Lichen roccella on the basaltic rocks bathed by the waters of the sea. From Wordnik.com. [Travels to the Equinoctial Regions of America] Reference
Lieben roccella. From Wordnik.com. [Allgemeines Polyglotten-Lexicon der Naturgeschichte mit erklaerenden Anmerkungen] Reference
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