6ra$ Iherbarium 
Ibarvart) '□niverstt^ 
B. L. ROBINSON, Curator 
Asa Gray Prof. Syst. Bot. 
M. L. FERNALD, 
Fisher Prof. Nat. Hist. (Bot.) 
CHARLES A. WEATHERBY, Assistant 
RUTH D. SANDERSON, Librarian 
IVAN M. JOHNSTON, Assistant 
LESLEY C. BROWN, Bibliographer 
LILY M. PERRY, Assistant 
CAMBRIDGE, MASSACHUSETTS, U.S.A. 
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