GRASSES OF IOWA. 



25 



CA-'' 



Fig. 16. Section of 

 leaf of Festuca tenella 

 Willd.' Car, mid- 

 nerve; CBP, chloro- 

 phyll bearing paren- 

 chyma; M, mestome 

 bundle; EC, epider- 

 mal cells; Ste, stere- 

 ome; Ti'i, trichome; 

 L, leptome; H, had- 

 rome. (Hansen and 

 King.) 



Fig. 17. Section of leaf of Eragrostis major Host. Hup, superior surface; Inf, infer- 

 or surface; B, buUiform cells; CBP, chlorophyll bearing parenchyma (Ball.) 



Fig. 18. Section 

 of leaf of Bromus 

 mollis. B, buUi- 

 form cells; CBP, 

 chlorophyll bear- 

 ing parenchyma; 

 Car, mid-nerve ; 

 Trl, trichome; L, 

 leptome; H, had- 

 rome; EC, epider- 

 mal cells; il, 

 mestome bundle; 

 Ste, stereome. 

 (Slrrlne and 

 King.) 



