140 OHIO BIOLOGICAL SURVEY 



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



130. Lemna cyclostasa (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. Erie County. 



Subclass, GLUMIPLORAE. 



Order, Graminales. 

 Cyperaceae. Sedge Family. 



Subfamily, scirpatae. 



135. Cyperus scliweinitzii Torr. Scliweinitz 's Cyperus. Erie, Cuya- 



hoga. 



136. Cyperus esculentus 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 engelraanni Steud. Engelmann's Cyperus. Wayne, 



Logan. 



142. Cyperus speciosus Vahl. Michaux's Cyperus. Ashtabula, Erie. 



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



Meigs. 



144. Cyperus diandrus Ton-. 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 arundinaceum (L.) Britt. Dulichium. Northern 



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



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



land County. 



