An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian
Britton, Nathaniel Lord, 1859-1934
Brown, Addison, 1830-1913
New York :C. Scribner's sons,1913.
2d ed.--rev. and enl.
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