BOTANY OF THE NORTHERN UNITED STATES.
Reading edition
MANUAL OF THE BOTANY OF THE NORTHERN UNITED STATES,
INCLUDING THE DISTRICT EAST OF THE MISSISSIPPI AND NORTH OF NORTH CAROLINA AND TENNESSEE.
By ASA GRAY, LATE FISHER PROFESSOR OF NATURAL HISTORY IN HARVARD UNIVERSITY.
Sixth Edition.
REVISED AND EXTENDED WESTWARD TO THE 100th MERIDIAN, BY SERENO WATSON, CURATOR OF THE GRAY HERBARIUM, HARVARD UNIVERSITY, AND JOHN M. COULTER, PROFESSOR OF BOTANY IN WABASH COLLEGE,
ASSISTED BY SPECIALISTS IN CERTAIN GROUPS.
WITH TWENTY-FIVE PLATES, ILLUSTRATING THE SEDGES, GRASSES, FERNS, ETC.
IVISON, BLAKEMAN, AND COMPANY, PUBLISHERS, NEW YORK AND CHICAGO. 1890.
Copyright, 1889, By the President and Fellows of Harvard College.