GRAMINEiE 187 



Tribe CHLORIDES. — Spikelets in one or two rows 

 on a flattened rachis, compressed laterally, i- or more- 

 flowered. 



23. Cynodon, Rich. 



Characters of the tribe. Not alpine. 

 C. Dactylon, Pers., Dog's-tooth Grass ; spikes digitate, 

 purplish, spikelets i -flowered ; sandy places. 



Tribe Festuce^E. — Spikelets in spikes or panicles; 

 glumes 6 or more, two lowest empty, the others flower- 

 ing. Genera 24-38. 



24. Danthonia, DC. 



Spikelets 2- or more-flowered, in panicles ; empty 

 glume with a long awn. 



D. decumbenSy DC. {Triodia decumbens^ Beauv.); stems 

 prostrate, rigid, caespitose, panicle 1-2 in., leaves and leaf- 

 sheaths hairy ; alpine pastures. D. provindalisy DC. 

 {calycina, Vill.) ; stem erect, up to 18 in., leaf-sheaths 

 bearded, awn twisted at the base ; alpine pastures in the 

 South, rare. 



25. Phragmites, Trin. 



Spikelets 2- or more-flowered; rachis bearded with long 

 silky hairs. Not alpine. 



P. communis y Trin. {Arundo Phragmites ^ L.), Reed; 

 panicle very large and soft, dull purple, leaves i|-2 in. 

 broad, stem up to 8 ft. ; in water, common. 



26. Sesleria, Scop. 



Spikelets capitate or in spikes, with empty soft glumes 

 beneath them. Alpine. 



