THE GENERAL CHARACTERS OF SEEDS 419 



Soft Chess {Bromus hordeaceiis L.). 



Flowering spikelet 7-9 mm. in length, obtuse and awned; awns 

 6-8 mm. in length ; roughened ; glume with 3 nerves on each side ; 

 glume bearing numerous hairs upon the surface; caryopsis 5 mm. 

 long, 2 mm. wide, light brown, scar at base, extending one-third 

 length of seed. 



Figure 253B 



Fig. 253. A. Soft Chess (.Bromus hordeaceus) . a, b, views of enlarged seed; 



0, natural size. 

 B. Chess (.Bromus secalinus). a, h, c, d, views of seed, enlarged; e, natural 



size. 

 (After Hillman.) 



Smooth Brome or Hungarian Brome Grass (Bromus inermis Leyss.) . 



Empty glumes unequal; flowering glumes awnless or short- 

 awned, with broad searious margin at obtuse or emarginate apex; 

 veins of flowering glume conspicuous, roughened; veins of palet 

 roughened; seed flattened, boat-shaped, one-third in. in length, 

 one- twelfth in. in width. 



