140 OHIO BIOLOGICAL SUETEY 



129. Lemna trisulea L. Ivy-jointed Duckweed. General. 



130. Lemna eyclostasa (Ell.) Chev. Valdivia Duckweed. Lake 



County. 



131. Lemna minor L. Lesser Duckweed. General. 



132. Wolffiella floridiana (J. D. Sm.) Thomp. Florida Wolffiella. 



Licking County. 



133. Wolffia Columbiana Karst. Columbia Wolffia. Ottawa, Frank- 



lin. 



134. Wolffia punctata Griseb. Punctate Wolffia. Brie County. 



Subclass, GLUMIFLORAE. 



Order, Graminales. 

 Cyperaceae. Sedge Family. 



Subfamily, sciepatae. 



135. Cyperus schweinitzii Torr. Sehweinitz's Cyperus. Brie, Cuya- 



hoga. 



136. Cyperus eseulentus L. Nut-grass (Cyperus). Western half of 



state, as far east as Wayne County. 



137. Cyperus erythrorhizos Muhl. Red-rooted Cyperus. Rather 



general. 



138. Cyperus inflexus Muhl. Awned Cyperus. Lucas, Champaign. 



139. Cyperus strigosus L. Straw-colored Cyperus. General. 



140. Cyperus filiculmis Vahl. Slender Cyperus. Rather general. 



141. Cyperus engelmanni Steud. Bngelmann's Cyperus. Wayne, 



Logan. 



142. Cyperus speeiosus Vahl. Michaux's Cyperus. Ashtabula, Brie. 



143. Cyperus flaveseens L. Yellow Cyperus. Fairfield, Richland, 



Meigs. 



144. Cyperus diandrus Torr. Low Cyperus. Northern half of state, 



as far south as Champaign County. 



145. Cyperus rivularis Kunth. Shining Cyperus. Rather general. 



146. Kyllinga pumila Mx. Low Kyllinga. Fairfield, Hocking, Cuya- 



hoga, Auglaize. 



147. Dulichium arundinaceuin (L.) Britt. Duliehium. Northern 



part of the state, south to Hocking and Clark Counties. 



148. Bleocharis mutata (L.) R. & S. Four-angled Spike-rush. Ash- 



land County. 



