PREFACE. 
Under direction of the Board of Trustees, the fifteenth 
annual report of the Missouri Botanical Garden is pre- 
sented to the public. 
The fourteenth volume was issued on October 8th, 1903, 
on which date separates of Mr. Rehder’s monograph of 
Lonicera were also distributed. 
These reports are sent to scientific institutions and jour- 
nals in exchange for publications or specimens desirable for 
the Garden, and, when possible, reprints of the botanical 
articles they contain are presented to botanists occupied 
with a study of the subjects they refer to. Any of the 
Garden publications not out of print may be purchased at 
approximately the cost of publication from A. I. Eriksson, 
Tufts College, Mass.; R. Friedlinder & Sohn, Berlin, 
Germany; W. Wesley & Son, London, England; or the 
undersigned. 
WILLIAM TRELEASE. 
St. Louis, Mo., February 15, 1904. 
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