IOS POA. 



Florets without long flocculent silky hairs at base. 

 Flowering glumes acute or acuminate. Anthers long. 



Culms slender ; leaves filiform ; spikelets large ; 



ligule membranous, sheathing - 5. P. intermedia. 



Culms slender ; leaves short, filiform ; spikelets 



small ; ligule membranous, sheathing - 6. P. Colensoi. 

 Culms slender ; leaves very short, rigid, acicular ; 



ligule membranous, sheathing - - 7. P. aciciilarifolia. 



Culms slender ; leaves shorter than the culm, flat ; 



ligule truncate 8. P. uniflora. 



Culms |- inch long ; leaves very short, rigid, 



obtuse ; ligule acuminate - 9. P. pygmaea. 



Flowering glumes obtuse. Anthers short. 



Culms slender, i 2 inches long ; leaves flaccid ; 



short - 10. P. exigua, 



Culms short, stout ; leaves rigid, shorter than the 



culm - ii. P. albida. 



Culms long, stout ; leaves flat, shorter than the 



culm - 12. P. Mackayt. 



Culms slender ; leaves flat, shorter than the culm ; 



spikelets tipped with purple - 13. P. Kirkii. 



Culms slender ; leaves very short, flaccid ; flower- 

 ing glume with a white membraneous border 14. P. Lindsayi. 

 Culms slender ; leaves shorter than the culms ; 



panicle green - - 15. P. breviglumis. 



Culms very slender ; leaves much shorter than the 



culm; whole plant flaccid, green - - 16. P. imbecille. 



