GRASSES OF IOWA. 



25 



Species about 18, chiefly in the warmer regions of both hemis- 

 pheres. Southern North America, Central America, Australia, Africa, 

 Asia, China and Japan, Europe and Brazil. 



3. SACCHARUM. 

 Saccharum. L. Sp. PI. 1: 7d. 1762. (ed. 2.). Bentham & Hooker. Gen. 

 PI. 3: 1125. Endlicher Gen. PI. 107. Hackel in Engler & Prantl. Nat. 

 Pflanz. Fam. II. 2: 23. /. 13. Scribner. Bull. U. S. Dept. Agrl. Div. Agros. 

 20: 18. /. 7. 



DESCRIPTION. 



Sugar Cane. Spikelets all alike, perfect, awnless, in numerous, 

 jointed racemes, forming a much branched terminal panicle. The 



Fio. 18. Succharum officinarum L. Sugar cane. —a, A portion of a branch of the 

 Inflorescence with two spikelets attached ; b, spikelet ; c, flower. 



somewhat hardened first and serond glumes empty, equal, awnless, empty 

 and hyaline; the fourth or flowering glume awnless, or simply mucron- 



