This section is from the book "Harper's Guide To Wild Flowers", by Caroline A. Creevey. Also available from Amazon: Harper's Guide To Wild Flowers.
Family, Mint. Color, pink or rose, sometimes spotted with yellow. Corolla, of the labiate type, the upper lip arched, the lower 3-cleft, the 2 lateral lobes small, oval, the middle one notched. Stem, long, 6 to 18 inches high, leafy, whitish with small hairs. Leaves, 1 to 2 inches long, linear, acute at both ends, serrate, petioled. Flower-clusters axillary, on long peduncles. June to September.
Waste places and fields, rather common from New Jersey westward and southward. On Long Island I happen to have found it only in Bridgehampton.
 
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