(14) 



11. Glyceria. Spikelets 2, co-flowered. Flor- 

 ets ovate, convex, awnless. Aquatic 

 grass. 



12. LophochlaBna. Spikelets co-flowered, 

 compressed, Glum* membranaceous. 

 Inferior palea 2-lobed, aristate from the 

 mid-nerve. Superior palea 2-carinate 

 with a pair of dentate appendages. 



13. Briza. Spikelets 2- co-flowered, densely 

 distichous. Florets awnless. Inferior 

 palea inflated, with auriculate cordate 

 base. 



14. Festuca. Spikelets 2- co-flowered. Flor- 

 ets lanceolate, convex. Superior palea 

 ciliate. Style inserted on the apex of 

 the ovary. 



15. Bromus. Spikelets co-flowered. Florets 



lanceolate. Style inserted below the 

 apex of the ovary on its ventral side. 



B. Flowers not glumaceous. 



1. Pentacsena. Calyx 2-seriate, persistent. 

 External sepals 3, cucullate at the apex, 

 ending in a spine; internal sepals 2, 

 mucronate. Fruit a utricle. 



Ill, Trigynia. 



1. Tillaea. Calyx 3-sepalous. Corolla 3- 

 petalous. Fruit 3 follicles, each 2- 

 seeded. Aquatic. 



