198 
IOWA ACADEMY OF SCIENCES. 
56. B, cii7'tipendula (Michx.) Torr. {B. racemosa Lag.) 
Common in dry, open ground. 
Phragmites. 
57. P. 'phragmites (L.) Karst. (P. commimis Trin.) 
Common in swamps. 
Eragrostis. 
58. E. purshii Schrad. Abundant in dry, waste ground 
59. E, major Host. Cultivated and waste ground 
abundant. 
60. E. hypnoides (Lam.) B. S. P. {E. repta?is Nees.) 
Muddy banks of streams; frequent. 
Eatonia. 
61. E. ohtusata (Michx.) Gray. Frequent in dry soil. 
Kceleria. 
62. K. cristata (L.) Pers. Common in dry, sterile soil. 
Melioa. 
63. M. mutica Walt. Frequent in moist, open or shady 
ground. 
Dactylis. 
64. D, glomerata L. Roadsides and waste ground; 
scarce. 
POA. 
65. P. annua L. Abundant in somewhat moist and 
shady situations. 
66. P. compressa L. With the following, but preferring 
rather dry ground; common. 
67. P. pratensis L. Almost universal. 
Panicularia. 
68. P. nervata (Willd) Kuntze {Glyceria nervata Trin.) 
Abundant in wet ground. 
69. P. ftuitans (L) Kuntze (G. fluitans R. Br.) Common 
in swamps and shallow ponds. 
Festuca. 
70. F. ocioflora Walt. (P. tenella Willd.) Abundant in 
dry, sterile ground. 
