BOTANY OF LA SALLE COUNTY. 129 



Heads long, round and very bristly. 



S. glau ca. Pig-eon Grass. Spike tawny. Com. 



S. viridis. Spike G., cult, grounds. 



S. Ital ica. Millet Hungarian Grass. 



Cen chrus. Hedgehog- or Bur Grass or Sand Bur. 

 Sandy lands. 



C. tribuloi des. Known by its bur-like seeds. 



Leer sia Virgin ica. Cut, Scratch or White Grass. 

 Leaves and stem prickly; plant whitish. 



L. oryzoides. Rice, Cut Grass. 



Zizan ia aquat ica. A. Water or Indian Rice. 3 

 to 9 ft. Water. 



Andropo g-on furca tus. Coarse, rigid, grass. 



A. scopa rius. 



Chrysopo gon nu tans. Indian Grass, Wild Sor- 

 ghum. 



Phal aris canarien sis. Canary Grass. Ribbon Grass. 



Anthoxan thum odoratum. Sweet Vernal Grass. 

 Sweet scented. 



Hierochloe borea lis. Vanilla or Seneca Grass. 1 

 to 2 ft. 



Aris tida tuberculo sa. Three-awned Grass. 



Sti pa spar tea. Porcupine Grass. 



Muhlinber gia Mexica na. 



M. sylva.t ica. 



M. diffu sa. 



Phleum pratense. Timothy. Herd's Grass. 



Alopecurus praten sis. Foxtail Grass. Spike cyl- 

 indrical, soft and dense. 



A. genicula tus var. aristula tus. In water and 

 Wet places. 



Sporob olus as per. * 



S. vaginaeflo rus. 



S. heterol epis. 



S. cryptan c'rus. 



