PREFACE. 
Under direction of the Board of Trustees, the thirteenth 
annual report of the Missouri Botanical Garden, containing, 
in addition to the administrative reports of the officers of 
the Board and the Director, the results of research work 
performed by the Garden staff or in connection with the 
institution, is presented to the public. 
To remove a misconception evidenced by occasional 
letters, it may be stated here that the Missouri Botanical 
Garden is located in St. Louis and is not a State establish- 
ment, but the gift to the community of a private citizen, the 
late Henry Shaw of St. Louis, and that it is administered 
by a Board of Trustees, the composition of which was in- 
dicated in his will founding the Garden, and the member- 
ship of which, from year to year, is shown in these reports. 
The twelfth report was issued June 22, 1901, though 
separates of several of the scientific papers included in it 
had been distributed at earlier dates, indicated at the foot 
of the first page of each such paper. 
These reports are sent to scientific institutions and journals 
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. Friedlander & Sohn, Berlin, 
Germany; W. Wesley & Son, London, England; or the 
undersigned. 
WILLIAM TRELEASE. 
St. Louris, Mo., June 20, 1902. 
(3) 
