FLORA OF MISSOURI. 



endeavored to make the list accurate and have not included species of 

 whose presence here I was not fully satisfied. 



The arrangement of the catalogue is made to conform to that of 

 Bentham and Hooker, and the nomenclature to that of "Gray's Flora 

 of North America," and "Gray's Manual" fifth edition. In giving 

 localities I have, in most cases given the names of the counties where 

 found, Jollowed by the names of the person who collected the specimen 

 now in the University herbarium, or reporting its presence. The cata- 

 logue contains the names of 123 orders with 1786 species and varieties. 



From the present incomplete list it will readily be seen that the 

 State has four well defined botanical regions. First, river bottom 

 lands extending along the entire length of the State on the East and 

 through its central portion along the Missouri river, and its larger trib- 

 utaries. Second, the swamp region of the Southeast. Third, the Ozark 

 region, including the hilly and broken country which covers a large 

 portion of the State South of the Missouri river. Fourth, the prairie 

 region which includes a large portion of the State North of the Missouri 

 river, together with the Northwestern portion of the part of the State 

 South of the Missouri river. In the extreme Northwest, the flora as- 

 sumes a character much resembling that which is typical of the West- 

 ern plains. The constantly changing character of the flora of a newly 

 settled country, makes it practically impossible to make a list whicli 

 is complete in all its details, as new plants are yearly introduced, or 

 are found in new localities driving out the earlier forms and producing 

 constant changes. When the State was organized our hills and prairies 

 produced an abundant growth of buffalo grass which soon gave place 

 to the blue joint which is, in turn being driven out by the more valu- 

 able blue-grass. With cultivation came purslane, dandelion, lambs- 

 quarter and hosts of other troublesome weeds from the East, and 

 within the last ten years the prickly solanum has immigrated from the 

 far West and now seems perfectly at home in the streets of St. Loujs. 



It is earnestly desired that the catalogue be made as complete as 

 possible, and to this end botanists and all others are requested to send 

 notes and speciriHins of plants not named in the present catalogue, or 

 from new localities. All such specimens will be placed in the Uni- 

 versity herbarium, and duly acknowledged in future editions of the 

 catalogue. 



December 31, 1885. 



