IGO 



77. Paiiif-ulaiia uervata (Willd.) Knnt/e. (Oiycerin nervata Trin.; 



Commou at the edges of various ponds. 



78. Paiiieularia fliiitans (L.) Kuntze. Floating Manna Grass. 



Not uncommon in ponds. 



79. Festuca eliator L. Fall Fescue Grass. 



Scattered, principally along the railroad. 

 SO. Bromus ciliatus L. Wood Chess. 



Tolerably common, scattered in thin forests. 



81. B. secalinus L. Cheat. Chess. 



In old wheat fields. 



82. Agropyron violaceum (Horuem) Vasey. I'nrplish Wheat Gras^. 



Along the Pennsylvania Railroad, near Warsaw. 

 S3. Hordeum jubatum I.. Wild Barley. Squirrel-tail Grass. 



Found in scant tufts along the Pennsylvania Railroad. 



84. Elymus virginicus I>. Wikl Rye. 



Scattered. 



85. Hystrix hystrix (L.) Millsp. Hedge-hog Grass. 



Some found at the edges of a field east of Eagle Lake. 

 SO. Cyperns diandrus Torr. Low Cyperus. 



In the lake ])lain. osi>ecially along I ho south part of Chicago 

 Hill. 



87. C. strigosus \j. Straw-colored Cyperus. 



Common in moist places. 



88. C. flliculmis Vahl. Slender Cyperus. 



Abundant on open sandy liillsides. 



89. Dulichium arundinaceum (L.) Britton. {/>. spathaceum Pers.) 



Common in marshy places. Most abundant in Market-street 

 pond. 

 9l». Eleocharis interstincta (Vahl.) R. and S. 



A few patches in the lake. One in the south end. the others 

 near Yarnelle's landing. 



91. E. mutata (L.) R. and S. Quadrangular Spike Rush. (E. quadrfingn- 



lata R. Br.) 



A few small patches in nearly tlie same regions as the above. 



92. E. ovata (Roth.) R. and S. 



The most abundant species of the genus. Found everywhere 

 in moist places. 



