252 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



California, Idaho, Nevada; rare. ELYMUS TRITICOIDES var. SIMPLEX 

 (Scribn. and Will.) Hitchc. Usually less than 60 cm tall; blades 

 rather short, involute; spike usually less than 

 10 cm long; spikelets mostly solitary; glumes 

 often rather broad at base. 91 (E. simplex 

 Scribn. and Will.) Wyoming and Colorado 

 to California (Tahoe) and eastern Oregon 

 (Harney County). 



9. Elymus ambiguus Vasey and Scribn. 

 (Fig. 489.) Culms few, loosely tufted, erect, 

 30 to 70 cm tall ; sheaths glabrous ; blades flat 

 to subin volute, 2 to 5 mm wide, scabrous; spike 

 erect, rather dense, 5 to 15 cm long; spikelets 

 solitary toward the base and apex of the spike, 

 mostly 2- to 4-flowered; glumes subulate, sca- 

 brous toward the awned tip ; lemmas glabrous or 

 scabrous on the back, about 1 cm long, short- 

 awned, the awn 2 to 5 mm long. 91 Open 

 slopes at medium altitudes in the mountains, 

 Colorado, rare in Montana and Utah. ELYMUS 

 AMBIGUUS var. STRIGOSUS (Rydb.) Hitchc. Lem- 

 mas strigose or pubescent. 91 (E. strigosus 

 Rydb., lemmas strigose; E. villijlorus Rydb., 

 lemmas pubescent.) Wyoming, Colorado. 



10. Elymus salina Jones. SALINA WILD-RYE. 

 (Fig. 490.) Culms erect, 30 to 80 cm tall, some- 

 times scabrous below nodes and below spike; 



sheaths scabrous ; 

 blades firm, invo- 

 lute, scabrous, or 

 rarely softly pubes- 

 cent ; spike slender, 

 erect, 5 to 12 cm 

 long; spikelets 

 mostly solitary, 

 often rather dis- 

 tant, 1 to 1.5 cm 

 long; glumes sub- 

 ulate, 4 to 8 mm long, sometimes reduced, 

 glabrous or scabrous; lemmas about 1 cm 

 long, awnless or rarely awn-tipped, gla- 

 brous or scabrous, rarely sparsely strigose, 

 the nerves obscure. 91 Rocky slopes 

 and sagebrush hills, Wyoming, Idaho, 

 Utah, and Arizona. 



FIGURE 486. Elymus hirti- 

 florus, Spike X 1; spikelet, X 

 5. (Type.) 



FIGURE 487. Elymus triticoides, X 1. (Cusick 763, Oreg.) 



11. Elymus condensatus Presl. GIANT WILD-RYE. (Fig. 491.) 

 Culms in large tufts, stout, usually 1 to 3 m tall, sometimes puberu- 

 lent, especially below the nodes, the rhizomes when present short and 



