IOWA ACADEMY OP SCIENCES. 
199 
71. F. elatior L. Roadsides and waste places; infrequent. 
72. F, nutans Willd. Abundant in dry woods. 
Bromus. 
73. B. ciliatus L. Frequent in woods. 
74. B. kahnii Gray. Dry, open woods; scarce. 
75. B. secalinus L. Fields and waste ground; infre- 
quent. 
Aoropyron. 
76. A. repens (L.) Beauv. Roadsides and waste grounds; 
common. 
77. A. repens glaucmn (Desf.) Scribn. Common, espe- 
cially along railroads. 
78. AAenerumNd^^Qj. Roadsides; infrequent. 
Hordeum. 
79. . H. jubatum L. An abundant and troublesome weed. 
Elymus. 
80. E. striatus Willd. Common in woods. 
81. E. virginicus L. Common in low ground along 
streams and roadsides. 
82. E. canadensis L. Abundant in meadows and waste 
ground. The variety glaucifolius Gr. is found 
infrequently along streams. 
Hystrix. 
83. H. hystrix (L.) Millsp. {Asprella hystrix Willd.) 
Common in woods. 
CYPERACE^. 
Cyperus. 
84. C. ftavescens L. Common in wet ground. 
85. C: riviilaris Kunth. (C. diandrus castaneus Torr.) 
Along streams; infrequent. 
86. C. infiexus Muhl. (G. aristatusBotVoA Wet, sandy 
ground along streams; frequent. 
87. C. esculentus L. Moist fields; abundant. 
88. C. strigosus L. Moist, open woods and along 
streams; common. Our specimens seem to be 
mostly the variety rohustior Kunth. 
