ADDITIONS TO THE CATALOG OF OHIO VASCULAR 



PLANTS FOR 1920.* 



John H. Schaffner, 

 Ohio vState University. 



In the following list are included a number of species new 

 to the state, a number which have been in the catalog but not 

 represented by specimens, and a considerable number which 

 extend the known range of their distribution in the state. 

 Because of its peculiar geographic position, Ohio has an unusual 

 number of species which have their limits within its boundaries. 

 It is hoped that the knowledge of the indigenous species will be 

 rapidly increased so that it will be possible to publish accurate 

 distribution maps of these plants. 



Plant geography will probably be of much greater economic 

 importance in the future than it has in the past and accurate 

 data of the present distribution of plants will be of much value 

 to the systematist, ecologist, agriculturist, and the plant 

 geographer who wishes to interpret the present species distri- 

 bution in relation to past migrations, especially, as these were 

 affected by the glacial period. For such work state catalogs 

 giving distribution notes by counties are very useful, for it thus 

 becomes easy to trace out limits on the ordinary maps. 



69. Pinus rigida Mill. Pitch Pine. Near Marietta, Wash- 



ington County. W. V. Balduf. 



70. Pinus virginiana Mill. Scrub Pine. Winterset, Guernsey 



County. T. L. Guyton. Near Marietta, Washington 

 County. W. V. Balduf. 



71. Pinus echinata Mill. Shortleaf Pine. Jackson Town- 



ship, Pike County, near the Ross County line. "Con- 

 fined to northeastern section, occupying ridges capped 

 with heavy sandstone." Forest W. Dean. Jefferson 

 Township, Scioto County, three miles south of the 

 Pike County line. Forest W. Dean. Near Marietta, 

 Washington County. W. V. Balduf. 



•^Papers from the Department of Botany, Ohio State University. No. 125. 



128 



