(SEVENTH EDITION-ILLUSTRATED)

A HANDBOOK OF THE

FLOWERING PLANTS AND FERNS

OF THE CENTRAL AND NORTHEASTERN UNITED STATES
AND ADJACENT CANADA

REARRANGED AND EXTENSIVELY REVISED BY

BENJAMIN LINCOLN ROBINSON
ASA GRAY PROFESSOR OF SYSTEMATIC BOTANY IN HARVARD UNIVERSITY

NEW YORK.:. CINCINNATI CHICAGO

AMERICAN BOOK COMPANY

August 11, 1970

COPYRIGHT, 1908, BY

THE PRESIDENT AND FELLOWS OF HARVARD COLLEGE
ENTERED AT STATIONERS' HALL, LONDON

W. P. 3