PISUM, in botany, a genus of the diadelphia decandria class. The stylus is triangular, carinated and downy above; and the two upper laciniæ of the calix are shorter than the rest. The species are four, only one of them, viz. the marinum, or pea-pease, a native of Britain.
Peas are nutritive, and accordingly used for food; but
rarely for any medicinal purposes, except to keep issues open; for which purpose they are rubbed with basilicon, or linimentum Aretæi.