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PASTORAL AND AGRICULTURAL BOTANY

HARSHBERGER

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Frontispiece.-Case 536, July 9, 1906. A locoed steer poisoned by having eaten stemless loco-weed (Aragallus (Oxytropis) Lamberti). Note the swelling and the curvature of the fetlock joints, which is peculiar to some locoed animals; the rough coat, staring eyes. In the last stage, the animals eat and drink very little. After Marsh C. Dwight: The Loco-weed Disease. Farmers' Bulletin 1054, Fig. 10, page 14, July, 1919.

PASTORAL AND

AGRICULTURAL BOTANY

FOR THE STUDY OF THE
INJURIOUS AND USEFUL PLANTS
OF COUNTRY AND FARM

BY

JOHN W. HARSHBERGER, PH.D.

PROFESSOR OF BOTANY, UNIVERSITY OF PENNSYLVANIA; FORMER LECTURER FARMERS' INSTITUTES
OF THE STATE OF PENNSYLVANIA; IN CHARGE OF THE FIELD AND SYSTEMATIC BOTANY,
MARINE BIOLOGICAL LABORATORY, COLD SPRING HARBOR, LONG ISLAND,

NEW YORK; PRESIDENT OF THE PHILADELPHIA NATURAL

HISTORY SOCIETY, PHILADELPHIA, 1920.

WITH 121 ILLUSTRATIONS

PHILADELPHIA

P. BLAKISTON'S SON & CO.
1012 WALNUT STREET

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