80 



Botanical Section 



[PT I 



margins, and their keels are slightly serrated on the upper 

 half. 



"Seeds" Outer palea 7 to 12 mm. long, smooth or pubescent, 

 broad and expanded above, seven-nerved, with membranous 

 margins. Its apex is bifid, and it bears a fine, somewhat wavy 

 and finely serrated sub-terminal awn, which is almost as long as 



Fig. 70 



Fig 70. Bromus arvensis var. secalinus. About -| nat size. 

 Fig. 70 a. " Seed" of same, x 5. 



the palea. Inner palea very thin, membranous, bearing a few 

 white hairs at its margins. Rachilla cylindrical, pubescent or 

 smooth, often bent or "bowed," and thickened upwards. (Fig. 

 68.) 



Bromus secalinus, L. (Fig. 70.) 



A cornfield variety of B. arvensis, from which it differs chiefly 

 in the form of its spikelets which are more broadly ovate in 



