40 IOWA ACADEMY OF SCIENCE 
155. Cyperus aristatus Rottb. Awned Cyperus. Not rare along 
streams. 
156. Cy perns schweinitzii Torr. Schweinitz’s Cyperns. Very com- 
mon in sandy soils. 
157. Cyperus erythrorizos Muhl. Red Rooted Cyperus. Common in 
wet meadows. 
158. Cyperus erythrorhizos Var. pumilus Engelm. 
159. Cyperus ferax Rich. Michaux’s Cyperns. Plenty in marshy 
places. 
160. Cyperus strigosus L. Straw Colored Cyperus. Abundant. 
161. Cyperus strigosus Var. roimstior Kunth. 
162. Cyperus strigosus Var. compositus Britt. 
163. Cyperus ftliculmis Vahl. Slender Cyperus. Locally plenty in dry 
rocky woodlands. 
ELEOCHARI8 R. Br. 
164. Eleocharis ovata (Roth) R. & S. Ovoid Spike Rush. Not rare. 
165. Eleocharis engelmanni Var. detonsa Cray. Engelman’s Spike 
Rush. Local near Oxford. 
166. Eleocharis palustris (L.) R. & S. Creeping Spike Rush. Very 
common in marshy places. 
167. Eleocharis palustris glaucescens (Willd.) Gray. Less common. 
168. Eleocharis avicularis (L.) R. & S. Needle Spike Rush. Common 
on muddy shores. 
169. Eleocharis acuminata (Muhl.) Nees. Flat Stemmed Spike Rush. 
Rare, State Quarry. 
SCIRPUS (Tourn) L. 
170. Scirpus validus Vahl. Great Bullrush. Common in marshes. 
171. Scirpus fluviatilis (Torr.) Gray. River Bullrush. Common along 
streams. 
172. Scirpus atrovirens Muhl. Dark-Green Bullrush. Very abundant 
in fields and meadows. 
173. Scirpus lineatus Michx. Reddish Bullrush. Rather scarce, State 
Quarries. 
174. Scirpus cyperinus (L.) Kunth. Wool Grass. Plenty in marshes. 
175. Scirpus atrocinctus Fern. Dark Wool Grass. With the last 
named above but much less common. 
