ORNITHOGALUM, in botany, a genus of the hexandria monogynia class. The corolla consists of six erect petals; and the filaments are alternately wider at the base. There are 11 species, three of them natives of Britain, viz. the luteum, or yellow star of Bethlehem; the pyrenaicum, or spiked star of Bethlehem; and the umbellatum, or common star of Bethlehem.