botany, a genus of the decandria trigynia class. The calyx is inflated; the corolla has five petals with ungules, and the capsule has three cells. There are 13 species, five of which are natives of Britain, viz. the bacciferus, or berry-bearing chickweed; the beken, or white corn-campion; the viscosus, or Dover campion; the olites, or Spanish catchfly; and the acaulis, or moss campion.