^6 UNIVERSITY OF MISSOURI STUDIES [238 



50. DIARRHENA Raf. [KORYCARPUS Ze^l 



107. D. Americana Beauv. [^K. diandrus (Michx.) Kuntze]. 

 Rich shady banks and alluvial woods; frequent. 



Ohio and Michigan to Kansas; Georgia to the Indian 

 Territory. 



51. UNIOLA L. Spike grass. 



108. U. latifolia Michx. 



Common on rich shady banks and hillsides. 

 Pennsylvania to Kansas; Florida to New Mexico. 



52. DAOTYLIS L. Orchard grass. 



109. D. glomerata L. 



Meadows and fields; common. 

 Old World, thence to the New. 



53. PGA L. Meadow grass. < 



no. P. annua L. Low spear grass. 

 Lawns and streets; becoming common. 

 Europe and Asia, thence throughout North America. 



III. P. pratensis L. Kentucky blue grass. June 

 grass. 



Fields and all open not wholly wild situations, forming 

 the usual sward of permanent meadows and pastures; only 

 occasional in woods. 



Temperate zones of both hemispheres. 



1X2. P. Wolfii Scribn. 



Rich wooded hillsides; rare. 

 Illinois to Tennessee and Kansas. 



113. P. alsodes Gray. Grove meadow grass. 

 Creek beds in shady glens; rare. 



Nova Scotia to Minnesota; North Carolina to Missouri. 



114. P. sylvestris Gray. Sylvan spear grass. 

 Rich rocky woods; infrequent. 



New York to Wisconsin and Nebraska; North Carolina 

 to Louisiana and Kansas. 



