MANUAL OF THE GRASSES OF THE UNITED STATES 



183 



Figure 245. 



■Uniola sessiliflora. Plant, X 1; floret, 

 X 5. (Tracy, Miss.) 



Figure 244. — Uniola ornithorhyncha. Plant, X 1; 

 floret, X 5. (Tracy and Lloyd 448, Miss.) 



24. CYNOSURUS L. Dogtail 



Spikelets of two kinds, sterile and fertile together, the fertile sessile, nearly- 

 covered by the short-pediceled sterile one, these pairs imbricate in a dense 

 1-sided spikelike panicle; sterile spikelets consisting of 2 glumes and several 

 narrow, acuminate, 1-nerved lemmas on a continuous rachilla; fertile spike- 

 lets 2- or 3-flowered, the glumes narrow, the lemmas broader, rounded on the 

 back, awn-tipped, the rachilla disarticulating above the glumes. Annuals or 

 perennials with narrow flat blades and dense spikelike or subcapitate panicles. 

 Type species, Cynosurus cristatus. Name from Greek kuon (kun-) dog, and 

 our a, tail. 



Plants perennial; panicles narrow, spikelike; awns inconspicuous 1. C. cristatus. 



Plants annual; panicles subcapitate; awns conspicuous 2. C. echinatus. 



1. Cynosurus cristatus L. Ceested 

 dogtail. (Fig. 248.) Perennial; culms to 60 cm. tall; panicle spikelike, 

 tufted or geniculate at base, erect, 30 linear, more or less curved, 3 to 8 cm. 



