208 
IOWA ACADEMY OP SCIENCES. 
Muhlenbergia Schreb. 
55. M. mexicana (L.) Trin. Common, woods and 
prairies. 
56. M. racemosa ( Michx.) B. S. P. (Muhlenbergia glom- 
erata Trin.) Common and quite difficult to sub- 
due in low ground. 
Phleum L. Timothy. 
57. P. pratense L. Escaped from cultivation. 
Alopecurus L. Marsh Fox-tail. 
58. A. fulvus Smith. Bare in marshes; the common 
eastern species, A. geniculatus L. has not been 
detected within our limits. 
Sporobolus R. Brown. Rush-grass. 
59. S. neglectus Nash. Very common in pastures, 
where it is utterly worthless, never being eaten 
by cattle. 
60. 8. cuspidatus (Torr.) Wood. A slender species, 
quite common on dry knolls. 
61. S. cryptandrus (Torr.) A. Gray. Rare, east bank 
of Iowa lake, and bank of Des Moines at Esther- 
ville. 
62. S . heterolepis A. Gray. A valuable bunch grass, 
common on high prairies; called wire-grass by 
haymakers, because the wirey culms when ma- 
ture are difficult to cut with the mower. 
Cinna L. Wood Reed-grass. 
68. C. arundinacea L. Low ground in woods; Iowa 
Lake. 
Agrostis L. 
64. A. alba L. (A. vulgaris With.) Red-top. Natural- 
ized from Europe. 
65. A. hyemalis (Walt.) B. S. P. (Agrostis scabra 
Willd.) Hair-grass. Common on low prairies. 
Calamagrostis Adans. 
66. C canadensis (Michx.) Beauv. Common, and very 
variable. 
67. C. confinis (Willd.) Nutt. Common on low prairies. 
