Bouova | 
JOURNAL OF THE 
NEW ENGLAND BOTANICAL CLUB 
Conducted and published for the Club, by 
BENJAMIN 
LINCOLN ROBINSON, Editor-in-Chief. 
FRANK SHIPLEY COLLINS 
MERRITT LYNDON FERNALD Associate Editors. 
HOLLIS WEBSTER 
WILLIAM PENN RICH EC 
EDWARD LOTHROP RAND ( Publication Committee. 
Vol. 22. January, 1920 No. 253. 
CONTENTS: 
William Gilson Farlow. L. W. Riddle i ; à : 1 
Variations in Lactuca canadensis. K. M. Wiegand . : 4 9 
Cardamine pratensis in America. M. L. Fernald à t 4 11 
A New Species of Spergularia. K. M. Wiegand ‘ ; a 15 
A Correction. N. F. Flynn ; , | ; F : 1 16 
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