38 



FESTUCA. 



i. Blades permanently folded, filiform or setaceous ... 



F. caprina. 

 Blades flat or involute when dry 2 



2. Top of ovary glabrous. Ligules extremely short ... 



F. vulpioides. 

 Top of ovary hairy. Ligules 1-2 hn. long ... 3 



3. Dioecious. Panicles dense and almost spike-Uke, some- 



times interrupted F. scabra. 



Hermaphrodite. Panicle compound or subcorymbose 4 



4. Panicle compound more or less nodding. Spikelets 6-8 



lin. long. Valves finely nerved F. costata. 



Panicle subcorymbose, at length divaricate. Spikelets 

 4-5 lin. long. Valves 5 ribbed F. longipes. 



FINGERHUTHIA. 



Glumes long and finely ciliate. Finely awned 



F. africana. 

 Glumes rigidly ciliolate. Mucronate ... F. sesleriaeformis. 



HOLCUS. 



Annual. Spikelets IJ lin. long. Upper glume awned. 



H. setiger. 

 Perennial. Spikelets 2 lin. long. Upper glume awnless. 



H. lanatus. 

 IIORDEUM. 



Perennial. All the glumes alike, subulate-ariState ... 



H. secalinum. 



.\nnual. Glumes of the intermediate spikelets narrow, 



ciliate H. murinum. 



ISCIIAEMUM. 



i. Blades setaceously filiform. Lower glume rough, tuber- 



culate I. franksae. 



Blades 2-6 lin. broad. Lower glume not tuBerculate 2 



2. Blades 3-6 lin. broad. Lower glume 5 ribbed 



I. fasciculatum. 



Blades 2 lin. broad. Lower glume not ribbed 



I. glaucostachyum. 

 I.ASIOCHLOA. 



1. Annual. Glumes caudate-acuminate. Mucros f-1^ lin. 



long L. ciliaris. 



Perennial. Glumes acute or acutely acuminate, not 

 mucronate 2 



