154 HORDEAE 



70. LOLIUM L. PERENNIAL RYE GRASS. 



I. Lolium perenne L. Perennial Rye Grass has been 

 tried as a pasture grass in a numljcr of places and has done fairly 

 well in the cooler mountains where it had enough water. Escaped 

 in such situations. It does poorly under cultivation in the lower 

 valleys. 



71. ELYMUS L. Wild Rye. 



Flowering glumes awnless or with a very short 



awn; empty glumes very narrow, awl- , 



shaped; flowering glume broadly lanceolate, 



smooth. 1. E. triticoidea. 



Flowering glume long awned; empty glumes 

 lanceolate or narrowly lanceolate, narrowed 

 at the base. 

 Spikf. narrow; spikelets erect. 



Leaves broad, 7 to 15 mm., spreading; empty 



glumes lanceolate; awns short. 2. E. glaucus. 



Leaves narrow, 5 mm. or less, usually 

 nearly erect; empty glumes narrowly 

 lanceolate; awns long. 3. E. macounii. 



Spike broad; spikelets spreading. 

 Flowering glumes glabrous. 4. E. brachystachya. 



Flowering glumes pubescent. 

 Flowering glumes hirsute or villous. 5. E. canadensis. 



Flowering glumes strigose-hispidulous or 

 scabrou.s; plant taller; leaves wider; 

 spike larger. 6. E. i-obnstus. 



1. Elymus triticoides Nutt. Not common. Occurs in the 



iDOuntai ..•- ;it hii>li(M- IcncIs. Canadian Zone. 



2. Elymus glaucus Buckl. In the mountains of the north- 

 ern part of the State; in the Transition Zone. 



3. Elymus macounii Vasey. A single specimen collected 

 at AlbuqiuMwuic is ;ill we have seen from New Mexico. 



4. Elymus brachystachys Serib. and Ball. Rare in th« 

 State: only one collection that we are sure of. 



5. Elymus canadensis L. Wild Rye. Common in the 



mountains at middle elevotioiis in the Transition and Upper 

 Sonoran Zones;, l)ut a'so occun-ing on ditch banks in the cultiTatad 

 areas of the Lower Soiior;iii Zone. 



6. Elymus robustUS S. and S. Veiy similar to th« last; i» 



cultivjilioii ;it i\T;itig;is Springs. 



