468 QRAM1NB&. 



TRIBE V. AVENE'.ffi, Spikelets panicled, terete or laterally compressed, 

 2- rarely 3-4-fld. ; rachilla produced beyond the fl. glume (except in 

 some Aira). Glumes 4 or more, 2 lowest empty usually larger than 

 the others, 2 or more upper flowering with a dorsal bent and twisted 

 (except some Airae and Deschampsice) awn. 



* Eachilla not produced beyond the uppermost fl. glume 20. Air a. 



** Rachilla produced beyond the uppermost fl. glume ; flowers all perfect or the 

 upper imperfect. 



Flowers 2 ; awn bent in the middle, tip clubbed 21. Corynephora. 



Flowers 2; awn straight 22. Deschampsia. 



Flowers 2 ; lower not awned, upper imperfect awned 23. Holcus. 



Flowers 2-6; fl. glume deeply 2-fid and awned 24. Trisetum. 



Flowers 2-6; fl. glume entire or 2-toothed, long-awned 25. Avena. 



*** Rachilla produced beyond thefl. glumes. Flowers 2, upper 2-sexual, lower 

 male 26. Arrhenatherum. 



TRIBE VI. CHLORIDE'^:. Spikelets 1-2-seriate on a flattened rachis, 

 laterally compressed, 1- or more-fid 27. Cynodon. 



TRIBE VII. FESTUCE'JE. Spikelets panicled or subspicate, terete or 

 laterally compressed ; rachilla usually produced beyond the fl. glume, 

 often bearing a rudimentary glume. Glumes 6 or more, 2 lowest empty, 

 the others flowering ; awn terminal or 0. 



SUB-TRIBE 1. Triodiese. Spikelets 2- or more-fld. ; rachilla not bearded. 

 Fl. glumes l-S^nerved, broadly 3-toothed 28. Triodia . 



SUB-TRIBE 2. Arundinese. Spikelets 2- or more-fld. ; rachilla bearded 

 with long silky hairs 29. Phragmitis. 



SUB-TRIBE 3. Sesleriese. Spikelets subspicate or capitate, with empty 

 glumes (imperfect spikelets) on the pedicels below them* 



Pedicels with soft glumes below the spikelets 30. Sesleria. 



Pedicels with bristle-like glumes below the spikelets 31. Cynosurus. 



SUB-TRIBE 4. Eragrostese. Spikelets 2- or more-fld. Fl. glumes 1- or 

 %-nerved. 



Spikelets in a subcylindric spike. Fl. glumes scarious ,32. Koeleria. 



Spikelets in a contracted panicle, conical, terete 33. Molinia. 



Spikelets in an effuse panicle with whorled branches 34. Catabrosa. 



SUB-TRIBE 5. Melicese. Spikelets 2- or more-fld. Fl. glumes 3-5-nerved, 

 upper empty, convolute and forming a club 35. Melica. 



SUB-TRIBE 6. Eufestucese. Spikelets %-many-fld. Fl. glumes 5- or more- 

 nerved. 



Spikelets few-fid., clustered in a secund panicle 36. Dactylis. 



Spikelets panicled, pendulous. Glumes broad, scarious, obtuse. 



37. Briza 

 Spikelets panicled. Fl. glumes compressed, keeled, tips nerved 



awnless. 38. Poa. 



