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Botany in a daythe patterns method of plant identification an herbal field guide to plant families of North AmericaBookby Elpel, Thomas J.
Published 2013 -
An illustrated flora of the northern United States Canada and the British possessionsfrom Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102d meridianBookby Britton, Nathaniel Lord, 1859-1934
Published 1913