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PREFACE. 



Under direction of the Board of Trustees, the nineteenth 

 annual report of the Missouri Botanical Garden is presented 



to the public. 



The eighteenth report was issued December 1, 1907, but 

 Professor Blankinship's account of Lindheimer and his col- 

 lections was separately distributed on November 25th, and 

 separates of the other scientific papers contained in the volume 

 were issued on the 27th of November. 



These reports are sent to scientific institutions and journals, 

 in exchange for publications and specimens desirable for the 

 library, herbarium or living collections of the Garden. So far 

 as is possible, reprints of the botanical articles they contain 

 are sent to botanists occupied with a study of the subjects to 



r 



which they pertain. 



Any of the Garden publications not out of print may be pur- 



^\...c.r.A c-i- o-rvv.t^rtviTYiQfoKr fViP poftf, nf nnhlinntion. from Mess, 



London, England; or the undersigned. 



W. Wesley 



William 



St. Louis, Mo., Sept. 25, 1908. 



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