CONTENTS. XIII 



Tribe XII. Hordeie 3 g 



Key to the genera of Hordeae 399 



Lolium 309 



Agropyron 3^4 



Secale 



325 



Triticum 395 



Hordeum 



329 



Elymus 340 



As P rella • 353 



Tribe XIII. Bambusese 355 



Arundinaria 35g 



