PREFACE. 
Under direction of the Board of Trustees, the sixth 
annual report of the Missouri Botanical Garden is offered 
to the public. This volume differs from those which pre- 
ceded it in the omission of the section consisting of 
‘‘ anniversary publications,’’ comprising the annual flower 
sermon and the proceedings at the two annual banquets 
instituted by Mr. Shaw, the Director’s report containing 
all that it is considered necessary to state concerning these. 
The fifth report was issued April 27th, 1894. Reprints 
of papers from the present volume were issued in advance 
of its publication as follows: — 
Smith, Sagittaria and Lophotocarpus, May 24th, 1894; 
Trelease, Leitneria Floridana, May 30th, 1894. 
The reports of the Garden are sent regularly to scientific 
institutions and journals in exchange for publications or 
specimens desirable for the library and herbarium of the 
Garden, and, so far as is possible, reprints of the botanical 
articles which they contain are sent to botanists to whom 
these papers are directly useful. 
Regular agents for the sale of Garden publications are 
Dr. A. E. Foote, of Philadelphia, W. Wesley & Son, of 
London, and R. Friedlander & Sohn, of Berlin. 
WiLuiaM TRELEASE. 
St. Louis, March 1, 1895. 
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