GRASSES OF IOWA. 



195 



Several sterile glumes above the flower Bouteloua. 6 . 



Two to three perfect flowers in each spikelet Eleusine.*. 



Flowers unisexual; spikelets dioecious, the staminate and pistillate 

 very different Buchloe." . 



1. CYNO ON. 



Cynodon Rich. Pers. Syn. 1: 85. 1805. Endlicher. Gen. PI. 92. Bentham 

 & Hooker. Gen. PI. 3: 1164. Hackel in Engler and Prantl. Nat. Pflanz. 

 Fam. II. 2: 58. /. 67. Pers. Syn. PI. 1: 85. 1805. Scribner. Bull. U. S. Dept. 

 Agrl. Div. Agros. 20: 99. f.73. 



Capriola Adans. Fam. 2: 31. 1763. 



Fibichia Koel. Gram. Gall. & Germ. 308. 1802. 



Spikelets i-flowered, with a mere naked, short-pedicelled rudiment 

 of a second flower, imbricate-spiked on one side of a flattish rachis; 

 the spikes usually digitate at the naked summit of the flowering culms. 

 Empty glumes keeled, pointless, rather unequal; flowering glume and 

 palet pointless and awnless, the glume large, boat-shaped. Stamens 3. 

 Low, diffusely branched and extensively creeping perennials, with short, 

 flattish leaves. (Name compounded from two Greek words for tooth 

 and dog.) 



Four species distributed throughout the tropical and temperate 

 regions of the world. The Bermuda grass, Cynodon Dactylon, is widely 

 naturalized. 



1. CYNODON DACTYLON. 



Cynodon Dactylon Pers. Syn. PI. 1: 85'. 1805. Watson and Coulter. 

 Gray. Man. Bot. 654.//. 9. 1890. (6ed.) Scribner. Grasses of Tenn. Bull. 

 Univ. Tenn. Agrl. Exp. Sta. 7: 86 /. 115. 1894. 



Capriola Dactylon (L ) Kuntze. Beal. Grasses of N. A. 2: 395. 1896. 

 Nash in Britton and Brown. 111. Fl. 1: 175./. 4oo. 1896. 



Cynodon Dactylon Pers. Scribner. Bull. U. S. Dept. Agrl. Div. Agros. 

 7: 177. f. 171. 1900. (3ed.) 



