nS THE GENERA AND THEIR SPECIES. 



broad and pointed. Outer palea large, concave, smooth, three- 

 ribbed ; inner palea flat and folded. Awns none* 



The depressed bristles account for the roughness of the spike 

 when drawn downwards through the hand. 



6. P. glauoum. Fields ; a native of warm countries, pro- 

 bably introduced. June to September. Root annual, fibrous. 

 Stem erect, furrowed, angled beneath spike. Leaves linear- 

 lanceolate, bearded at base, glaucous. Sheaths shorter than 

 leaves ; ligule small. Spike compact, cylindrical. Spikelets 

 dorsally compressed, crowded, florets two, bristly, bristles erect. 

 Glumes three in number, the third the largest. Outer palea 

 wrinkled transversely ; inner palea smaller than outer. Awns 

 none. 



The erect bristles account for the roughness of the spike 

 when drawn upwards through the hand. 



7. P. viride. Fields, a native of warm climates. July and 

 August. Root annual, fibrous. Stems numerous, geniculate, 

 smooth below, frequently rough above. Leaves lanceolate, 

 rough. Sheaths smooth, ribbed ; ligule short, blunt, margin hairy. 



Spike compact, branches hairy. 

 Spikelets dorsally compressed, 

 crowded, bristly, bristles erect, 

 green, one floret. Glumes three 

 in number, one small, the other 

 two equal. Outer palea as large 

 as the larger glume, smooth, not 

 wrinkled transversely ; inner palea 

 flat and folded at edges. Awns 



Panicum viride. none. 



Spikeiet. For Floret see p; 62. The Green ristle Grass is 



found chiefly in East Anglia ; it 

 is not common, though, perhaps, more frequent than the two 

 preceding species. Its nutritive value being slight it does not 

 exhaust the soil, and thrives in the same places on dry, sandy 

 ground for years without manure. 



