POLYGALA, MILKWORT; a genus of plants belonging to the diadelphia class; and in the natural me-
thod ranking under the 33d order, Lomentaceæ. See Polygala BOTANY Index.
POLYGAMIA (πολις, many, and γαμος, marriage), is a term expressing an intercommunication of sexes, and is applied by Linnæus both to plants and flowers. A polygamous plant is that which bears both hermaphrodite flowers, and male or female, or both.