IOWA ACADEMY OF SCIENCES. 
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Calamovilfa Hack. 
68. C long if olia (Hook.) Hack. ( Calamagrostis longi- 
folia Hook). Rare in dry ground; just south of 
state line on road to Iowa Lake from the south. 
Spartina Schreb. Tall Slough-grass. 
69. S cynosuroides (L.) Willd. Very common on low 
prairies, and one of our most valuable native 
grasses. The long white rhizomes are very num- 
erous, and are difficult to cut with the plow. 
Bouteloua Lag. Grama-grass. 
70. B oligostachya (Nutt.) Torr. Rare; dry ground near 
Estherville. 
Atheropogon Muhl. 
71. A curtipendula (Michx.) Eourn. ( Bouteloua curtipen- 
dula Torr). Common on upland prairies. 
Phragmites Trin. Reed. 
72. P. phragmites (L) Karst. (P. communis Trin). Our 
tallest species of grass, everywhere common in 
marshes. 
Eragrostis Beauv. 
73. E. frankii Steud. Local; north shore of Iowa Lake. 
74. E. purshii Schrad. Infrequent; shores of lakes and 
along roadsides where the seeds have probably 
been carried by the wheels of vehicles. 
75. E. major Host. (E. poceoides var megastachya A. Gray.) 
Introduced in cultivated ground. 
76. E hypnoides (Lam.) P. S. P. (E. reptans Nees.) 
Common on river banks. 
Eatonia Raf. 
77. E ohtusata (Michx.) A. Gray. Common on dry 
prairies. 
78. E. pennsylvanica (D. C.) A. Gray. Common in low 
ground and marshes. 
79. E. pennsylvanica major Torr. Infrequent in low 
places. 
Koeleria Pers. 
80. K. cristata (L.) Pers. Very common on high prairies. 
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