FESTUCE^ 223 



N. Lemmas papery, sca- 

 rious-margined, nar- 

 row and awned or 

 acuminate, or broad 

 and obtuse (the up- 

 per lemmas then re- 

 duced to a club- 

 shaped rudiment 

 enfolded by the up- 

 per broad lemmas); 

 spikelets tawny or 

 purplish, not green. .Melica. 

 NN. Lemmas not scarious- 

 margined, or if 

 slightly so, only at 

 the tip, the lemma 

 green (Poa). 

 o. Lemma obscurely 

 nerved, rounded on 

 back, obtuse, awn- 

 less; glumes small, 

 much shorter than 

 lemmas. Low plants 

 of the seashore and 



of alkahne soil Pucoinellia. 



oo. Lemma distinctly 

 nerved ; glumes 

 nearly as long as 

 the first lemma. 

 p. Nerves of lemma 

 prominent, paral- 

 lel; lemma broad, 

 obtuse, awnless, 8- 



to 9-nerved Panicularia. 



pp. Nerves of lemma 

 evident but not 

 prominent. 

 Q. Lemmas obtuse 

 or acutish, awn- 

 less, somewhat 

 scarious at tip, 

 5-nerved, some- 

 times cobwebby 



at base Poa (Par. 251). 



QQ. Lemmas acute or 

 awned. 

 R. Lemmas entire, 



often awned, (Par. 254), 



rounded below. Festuca 



