Elymus 



HORDEAE 



115 



50 



Map 177 



Elymus canadensis L. 



a few of our northern counties, where it is found in dry, sandy or clayey 

 soil on the crests of low dunes, on wooded banks about lakes, and in 

 springy places and marshes. 



Newf. to Alaska, southw. to the mts. of Md., Ind., Nebr., N. Mex., 

 Ariz., and Calif. 



40-408. TRITICUM L. Wheat 



Wheat is a winter annual and it often grows where it finds lodgment 

 along roads, paths, fields, and waste places, but it does not persist. It has 

 been reported from Porter County by Lyon under the name of Triticum 

 aestivum and from Jasper County by Welch as Triticum sativum. 



Wheat properly belongs with the excluded species because it fails to 

 perpetuate itself. 



42-407. SECALE L. Rye 



Rye is a winter annual which springs up where it may be scattered 

 along roads, in fields, and in waste places, but it will not persist. It has 

 been reported from Jasper County by Welch. 



Rye properly belongs with the excluded species because it fails to per- 

 petuate itself. 



43-411. ELYMUS L. Wild-rye 



[Note: Measurements of glumes and lemmas include their awns, and measurements 

 of paleas are those of the first floret of a spikelet taken from the middle of the spike.] 



Awns long and, at maturity, curved outward; paleas mostly 10-13 mm long 



1. E. canadensis. 



Awns straight; paleas mostly 6-9 mm long. 



Glumes 0.5-1 mm wide (rarely up to 1.3 mm wide), straight or only slightly bowed 

 out at the base, mostly 3-nerved above the middle; spikes long-exserted. 

 Blades glabrous above and beneath; paleas 7-8 mm long; grain 5-6.5 mm long. 

 2. E. riparins. 



