328 GLUMACE^E 



35. Briza (Quaking Grass). Spikeleis seveial-flowered, flat, 

 broad, short, hanging from the very slender branches of a loose 

 panicle ; glumes broad, concave, not keeled, imbricate, obtuse, 

 membranous on the edges. (Name from the Greek britho, I balance, 

 because of the suspended spikelets.) 



ff| Flowering glume truncate and slightly jagged at the lop 



36. Catabrosa (Whorl-Grass). Closely allied to Poa, but the 

 spikelets have only 2 flowers, and the glumes are broad truncate 

 and slightly jagged at the top. (Name from the Greek kalabrosis, 

 an eating out, referring to the jagged glumes.) 



** Flowering glume with converging veins all or 1-3 of 

 which combine in the awn 



37. Cynosurus (Dog's-tail-Grass). Spikelets in sessile clusters 

 which form a i-sided spike or head ; outer spikelets of each cluster 

 consisting of several empty glumes, the others with 2-5 flowers ; 

 glumes pointed or awned, as in Festuca. (Name from the Greek 

 kuon, a dog, and oura, a tail.) 



38. Dactylis (Cock's- foot-Grass). Differs from Festuca in 

 having the spikelets densely crowded in thick i-sided clusters, 

 which are arranged in an irregular short spike or slightly branched 

 panicle. (Name from the Greek daktulos, a finger, in allusion to 

 the arrangement of the spikelets.) 



39. Festuca (Fescue). Spikelets usually numerous, several- 

 flowered, in a compact or spreading panicle ; outer glumes unequal, 

 keeled ; flowering glumes lanceolate, convex on the back, pointed 

 or awned, scarcely membranous on the edges ; fruit furrowed ; 

 style terminal. {Festuca is the old Latin name.) 



40. Bromus (Brome). Spikelets several-flowered, rather large, 

 erect or drooping, in a branched loose or compact panicle ; outer 

 glumes unequal, usually keeled and awnless ; flowering glumes 

 longer, rounded on the back, membranous on the edges, with a 

 usually long awn inserted below the notched or cleft apex ; ovary 

 often hairy, with the style inserted below the apex. (Name from 

 the Greek bromos, oats.) 



B. Inflorescence spike-like ; spikelets borne in hollows of the rachis 



Tribe xy. Hordeie^e. Spikeleis solitary or 2 or 3 together, sessile 

 or shortly stalked on opposite sides of a channelled and toothed, 

 jointed rachis ; uppermost flowers often barren. 



41. Brachypodium (False Brome). Spikelets many-flowered, 

 lone, in a single spike, as in Agrofryron, but they are not so much 



