92 UNIVERSITY OF MISSOURI STUDIES [234 



79 a. A. geniculatus fulvus (J. E. Smith) Scribn. \_A, 

 geniculatus aristulatus (Michx.) Torr.]. 



Muddy shores and ditches; the typical limose grass. 



Newfoundland to British Columbia; Florida to Cali- 

 fornia. 



35. SPOROBOLUS R. Br. Rush grass. 



80. S. vaginaeflorus (Torr.) Wood \S. minor Vasey]. 

 Common along paths and roadsides. 

 Massachusetts to Texas. 



81. S. cuspidatus (Torr.) Wood [5. brevifolms (Nutt. ) 

 Scribn.]. 



Open thickets south of the waterworks dam. 

 Northwest Territory and Manitoba to Missouri and 



Kansas. 



36. OINNA L. Wood reed grass. 



82. O. arundinacea L. 



Rare in wooded deep ravines. 



Newfoundland and the Northwest Territory to North 

 Carolina and Texas. 



37. AGROSTIS L. Bent grass. 



83. A. alba L. White bent grass. 

 Low flat meadows and along streams. 

 Europe, thence throughout North America. 



84. A. vulgaris With. [A. alba vulgaris (With.) Thurber]. 

 Red top. 



Meadows and upland pastures, but also in low flats: too 

 near the preceding, with which it is now more usually united- 

 Europe, thence throughout all temperate regions. 



85. A. perennans (Walt.) Tuckerm. Thin grass. 

 Oak woods in rich soil. 



Quebec to Wisconsin; North Carolina to Kansas and 

 Texas. 



