42 



THE TRUE GRASSES. 



the protruding radicle in germination. Tall perennial 

 grasses with rather broad leaves. 



Species two or three, in sub-tropical America north of 

 the Equator. Tr. dactyloides L. (" Gama grass") extends 



FIG. ll.Triptacwn dactyloides L. R, 

 Joint of the rachis. (After Asa 

 Gray, " Man.," plate 14.) 



Fio. 12. CoixLacrt/ma L. (After 

 Mart, and Eichl.', " Fl. bras.,' 1 

 II. II. plate 10.) 



as far north as Illinois and Connecticut, growing in wet 

 places, and is used for fodder and also as an ornamental 

 plant. (Fig. 11.) 



4. (33) Polytoca Brown. (CyathoracMs'Nees.) Terminal 

 panicle consisting of from three to many $ spikes. Fas- 



