1 pee ri x 
po ae 
VOL. IV. : JULY, 1916, NO, 10. 
“nitty MIDLAND | 
NATURALIST 
Devoted to Natural History, Primarily 
that of the Prairie States 
“thy 
Published by the University of Notre Dame, 
Notre Dame, Indiana . 
J. A. NIEUWLAND, C.S.C., Ph. D., Sc. D., Editor 
CONTENTS 
Enumerantur Plantae Dakotae Septentrionalis Vascu- 
lares.—VII. J. Lunell 419 
The Naiades of Missouri.—VIII. William I. Utterback 432. 
Cleistogamous Flowers in the Pansies ~*~ J. A.Nieuwland 464 
Book Notice 466 
me. (5 
$1.50 A YEAR SINGLE NUMBERS 30 CENTS 
FOREIGN, 6s. 6d. - 
Entered as second-class matter December 15, 1909, at the post office at 
Notre Dame, Indiana, under the Act of March 3, 1879. 
THE UNIVERSITY PRESS, NOTRE DAME, INDIANA 
