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.
This is much like the last in flowers and leaves. The latter are often variegated with white spots. It is probably an introduced species, but is quite common in wet meadows and low grounds, seemingly indigenous westward. It is of a creeping habit Flowers one inch across.
 
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