Mr. Geyefs Plants of Illinois and Missouri. 103 



cles smooth. E. latifolium, Hoppe, (E. polystachyum, Auct.) 

 has flat leaves and scabrous peduncles ; and both have obovate, 

 dark or light brown seeds. 



I propose the following disposition of these species, acknowl- 

 edging however that I have studied the American varieties from 

 dried specimens only, never having observed any living ones. 



E. latifolium (Hoppe): culmo trigono, foliis planis apice tri- 

 quetris, spiculis^plurimis, pedunculis scabris, nucibus obovatis. 

 E. polystachyum, @. Linn. 



«. nigro-carinatum : squamis floriferis plnmbeis, carina ni- 

 gricante, nucibus acutiusculis brunneis. Germany ; probably 

 throughout Europe. 



§. viridi-carinatum : sqnamis floriferis obscuris, carina vires- 

 cente, nucibus obtusis, lutescentibus. Massachusetts, Ohio. 



E. angustifolium (Roth) : culmo teretiusculo, foliis canalicu- 

 latis apice triquetris, spiculis pluribus, pedunculis lasvibus, nuci- 

 bus oblanceolatis acutis. E . polystachyum, a. Linn. 



Squama? floriferas nigro-carinatas, albo-marginatas. Europe. I 

 have not seen any American specimens. 



E. gracile (Koch): culmo obsolete trigono, foliis triquetris, spi- 

 culis pluribus, pedunculis scabris, nucibus linearibus (flavicanti- 

 bus). E. polystachyum, y. Linn. E. triquetrum, Hoppe. 



a. plurinervium : pedunculis tomentoso-scabris, squamis flori- 

 feris pallidis, nervis pluribus pallidioribus striatis, nucibus obtusi- 

 usculis. Germany. 



(9. paucinervium : pedunculis scabris, squamis floriferis pallidis, 

 nervis paucis (3) pallidioribus notatis, nucibus acutis. Illinois, 

 Ohio, Pennsylvania. 



126. Carex rosea, Schk. 



127. Carex multiflora, Muhl. 



128. Carex arida, 



Torr. & Schw. 



129. Carex cristata, 



Torr. & Schw. 



130. Carex Willdenovii, Schk. 



131. Carex Torreyana, Dew. 



132. Carex Shortii, Torr. 



133. Carex laxiflora, Lam.? 

 133. Carex Mcadii, Dew. in 



Sill. Journ. Vol. xliii, p. 90. 

 135. Carex umbellata, Schk. 



136. Panicum virgatum, Linn. 



137. Panicum pubescens, Lam. 



138. Panicum scoparium, Lam. 



139. Panicum clandestinum, 



Linn. 



140. Digitaria filiformis, Ell., 

 var. floribus majoribiis. 



141. Aristida stricta, Michx. 



142. Melica speciosa, Muhl. ? 



143. Festuca nutans, Willd. 



144. Diarrhena Americana, 



Pal. de Beauv. 



