QUERCUS Marina, the Sea Oak, in Botany, the name of a broad-leaved dichotomous sea-fucus. It is not agreed, among the late botanists, what was the sea-oak of Theophrastus; and the most ancient botanists, Clusius and Cæsalpinus, suppose it to have been a species of the shrubby coralline; but that seems by no means to have been the case, since Theophrastus says his sea-oak had a long, thick, and fleshy leaf; whence we
may much more naturally conclude it to have been of the fucus class.