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, violet or purplish blue. Calyx and corolla, tubular, 2-lipped. Filaments split above, the lower tooth bearing the anther. Flowers, in clusters of 3, sessile, all in a compact, terminal, clover-like head. Bract-like leaves grow with them. Leaves, petioled, long, narrow, entire or toothed, generally rough-hairy. June to September.
A plebeian-looking plant growing in pastures and beside roads. It is smart and cheery looking, although often sadly dusted and bedraggled. 6 inches high. Common. (See illustration, p. 338.)
Self-heal (Prunella vulgaris')
 
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