λευκό-ϊον · leuko-ion — LSJ
white-violet:
gilliflower, Matthiola incana, Theoc. 7.64, Dsc. 3.123, etc.
snowdrop, Galanthus nivalis, flowering very early, Thphr. HP 6.8.1; joined with the narcissus and lily in AP 5.143 (Mel.), 146 (Id.).
λ. τὸ μέλαν, = ἴον τὸ μέλαν, Hp. Nat.Mul. 32.