IOWA ACADEMY OF SCIENCES. 
201 
106. C.fusca All. Low meadows; infrequent. 
107. C. stricta Lam. Abundant in bogs, low meadows, 
and along streams. 
108. C. stricta angiistata (Boott.) Bail. Ditches near 
railroad; frequent. 
109. C. davisii Schw. & Torr. Moist woods; infrequent. 
110. C. longirostris Torr. Common in damp woods. 
111. C . assinihoinensis A single colony, growing 
in a moist thicket; apparently quite typical. 
Culms long, slender and nearly prostrate. Abun- 
dantly stoloniferous in late summer, the stolons 
four feet in length. 
,112. C. tetanica Schk. Frequent in wet woods. 
113. C. yneadii Dew. (C. tetanica meadii Bail.) Wet 
meadows; frequent. 
114. C. laxiflora hlanda (Dew.) Boott. (C. laxijlora 
striatula Carey). Common in wet woods. 
115. C. laxijlora various Bail. With the preceding; 
common. 
116. C. alhursina Sheld. (C. laxiflora latifolia 
Deep, moist woods; scarce. Wholly unlike any 
of the forms of C. laxiflora found in our 
territory. 
117. C. laxiculmis Schwein. Wet ground along 
streams; frequent. Our material differs from the 
type in having the pistillate spike linear, three 
to five times as long as wide, and the perigynia 
scarcely angled and abruptly tipped with a short 
bub distinct entire beak, which is either straight 
or slightly curved outward. 
118. C. setifolia (Dew.) Brit. (C. ehurnea Boott.) Fre^- 
quent on dry cliffs along the Iowa river. 
119. C. pennsylvanica Lam. Dry woods and prairies; 
abundant. 
120. C, puhescem Muhl. Common in woods. 
121. C. stipata Muhl. Swampy ground; frequent. 
122. C. teretiuscula Oooden. Wet meadows and bogs; 
frequent. 
