THE TRIBES AND THEIR GENERA. 



55 



Dactylis. Panicle one - sided. 

 Spikelets in clusters. Florets three 

 to five, concave on [inner side. 

 Glumes unequal, pointed, keeled, 

 convex, herbaceous. Outer palea 

 compressed, keeled, keel fringed, apex 

 continued as a short awn. Lodicules 

 lanceolate, tumid at base. Stamens 

 three ; filaments longer than outer 

 palea, slender. Styles spreading. 

 Stigmas feathery. Grain oblong, 

 naked, grooved, free. 



Species. D. glomerata, 74, 



Dactylis glomerata. 

 Floret. For Spikelet see p. 94. 



Cynosurus. Panicle spike-like or capitate, one-sided. Spike- 

 lets of two forms in sessile clusters. Each spikelet with a comb- 

 like bract at base. Barren spikelets 

 with awned or pointed glumes ; fer- 

 tile spikelets with two or three florets. 

 Glumes two, nearly equal, keeled. 

 Outer palea long, concave, with 

 terminal bristle. Inner palea flat, 

 awnless. Lodicules ovate, acute, 

 swollen at base. Stamens three ; 

 filaments capillary ; anthers oblong, 

 pointed. Styles reflexed, hairy. Stig- 

 mas plumose, protruding from sides. 

 Grain oblong, closely covered with 

 paleae. 



Species. C. cristalus, /$. 

 C. echinatus, 76 



Cynosurus cristalus. 

 Floret. For Spikelet see p. 92 



Poa. Panicle simple or compound ; branches in whorls of 

 one to five. Spikelets not imbricated or clustered, Rachilla 

 often hairy. Florets many, awnless. Glumes rather unequal, 

 ovate, pointed, mostly keeled, awnless, herbaceous or 



