O. umbellatum: bulbous, dwarf; leaves long, linear, flaccid; flowers corymbose, on a short scape, shorter than the leaves, white with green streaks outside. - Star of Bethlehem. - Meadows and pastures. Fl. April, May.
O. nutans: bulbous; leaves linear-lanceolate; flowers large, nodding, racemose, white, greenish outside. - Fields and orchards. Fl. April, May.