This section is from the book "British Wild Flowers In The Four Seasons", by Thomas Moore. Also available from Amazon: British Wild Flowers.
A. vulgaris: stem 1 1/2-3 feet high, leafy; radical leaves long-stalked, twice ternate, with broad, three-lobed, crenate, glaucous-green segments; flowers in a loose panicle, large, drooping, blue or dull purple, the petals with incurved spurs. - Coppices and open woods. Fl. June, July.
 
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