138 



FES TUC A. 



1. 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 lin. long 3 



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



times interrupted F. scabra. 



Hermaphrodite. Panicle compound or subcorymbose \ 

 A. 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. 



FINGERIIUTIIIA. 



Glumes long and finely ciliate. Finely awned 



F. africana. 

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



HOLCUS. 



Annual. Spikelets 1£ lin. long. Upper glume awned. 



H. setiger. 

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



II. lanatus. 

 IIORDEUM. 



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



H. seealimim. 



Annual. Glumes of the intermediate spikelets narrow, 



ciliate II. murinum. 



ISCHAEMUM. 



1. 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. glaucosfachyum. 

 LASIOCHLOA. 



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



long L. eiliaris. 



Perennial. Glumes acute or acutely acuminate, not 

 mucronate 2 



