SEEDS <>K RESCUE GRASS AM> CHESS. 



Fig. ■.:.— Seedsof chess (Bromui secalinua): a and 6, front views: 

 c, edge view; <!, buck view of seeds; c, seeds, natural size. 

 Tin' first three show the palea and pedicel. 



exposed; grain equal to the glume and palea. often exposed at the 

 apex of the floret, deeply grooved, reddish brown, sometimes occur- 

 ring free from the glume and palea. The florets are Light or dark 

 brown and mostly smooth, and sometimes have a slight diffused luster 

 under the lens. (Fig. 2.) 



The more evident characters by which rescue-grass seed and chess 

 seed may be distinguished upon comparison are as follows: 



Rescue-grass seeds, being strongly compressed, lit 1 only on one side 

 when resting on a Level 

 surface; and thus appear 

 lance-shaped or broadly 

 awl-shaped, tapering uni- 

 formly to a sharp, short - 

 awned point. In con- 

 trast, the chess seeds are 

 from little more than < >ne- 

 fourth to one - half as 

 long, more robust, not 

 evidently flattened, near- 

 ly cylindrical, grooved along one side, abruptly pointed, the apex with a 

 very short or somewhat longer awn or awnless. W hen resting on a level 

 surface they may lie slightly at one side of the midvein of the back, 

 exposing to view the grooved face and a part of one side, or they may 

 lie on the grooved face, showing the back. They more rarely rest 

 directly on the back. Furthermore, the general color of a sample of 

 chess is much darker brown than one of rescue-grass seed. 



Bromus racemosus L. 

 Upright Chess. 



Florets about 9 mm. (£ inch) long, exclusive of the slender awn, 

 which varies from 4 to 9 mm. in length, similar to those of Brom us 



secalinus in general form. 

 The glume is broader than 

 in B. secalinxis and usually 

 more arched at the margins; 

 edges sometimes membra- 

 nous, especially at the apex, 

 which is notched above the 

 insertion of the awn and of- 

 ten flaring; veins sometimes 

 distinct; palea shorter than 

 the glume, broadly hollowed 

 or grooved, its keels more or 

 less exposed and hispid-ciliate; grain shorter than the palea or at least 

 covered by it, more broadly grooved than in Bromus secalinus. The 



Fig. 3.— Upright chess (Bromus racemosus): a, back view; 

 b and c, front views, and d, side view of seeds; e, seeds, 

 natural size. Views b and c show the paleaand pedicel. 



