Bui. 1 SO. Bureau of Plant Industry, U. S. Dept. of Agriculture. 



PLATE VI 



Fig. 1 .—Spike of Triticum dicoccum dicoc- 

 coides, Showing Long Glumes; very Hir- 

 sute. 



(Natural size.) 



Fig. 2.— Spike of Triticum mono- 

 coccum. 



(Natural size.) 



