This section is from the book "Who's Who Among The Wild Flowers", by W. I. Beecroft. Also available from Amazon: A Field Guide to Edible Wild Plants.
Mentha arvensis var. canadensis. Mint Family. July - Sept.
Found in wet places. New Brunswick to California.
Purplish to white, tiny in whorls at the angles of the leaves.
Tapering from the center toward each end, toothed, hairy throughout, aromatic odor like pennyroyal. Plant stems branching, 10 - 24 inches high.
Wild Mint.
 
Continue to: