GRASS FAMILY 



249 



3. Elymus vancouverensis \'asey. 

 Vancouver Rye-grass. Fig. 591. 



Elvmiis tancotnerensis Vasey, Bull. Torrey Club 15: 48. 

 "1888. 



Perennial, with abundant creeping rhizomes; 

 culms erect. 80-150 cm. tall, smooth, or puberulent 

 below the spike ; sheaths smooth ; blades flat, gradu- 

 ally narrowed to a slender involute point, scabrous 

 above, glabrous beneath, 5-8 mm. wide; spike erect, 

 10-20 cm. long; glumes narrowly lanceolate, firm, 

 gradually acuminate, 1-1.5 cm. long, sparsely long- 

 villous, especially toward apex; lemmas firm 1-1.5 

 cm. long, narrowed to a short awn. 



Along the seacoast, Vancouver Island to Eureka, Cali- 

 fornia. July-Aug. Type locality: Vancouver Island. 



4. Elymus triticoides Buckl. 

 Alkali Rye-grass. Fig. 592. 



Elvmiis triticoides Buckl. Proc. Acad. Phila. 1862: 99. 



' 1863. 

 Elymus condcnsatus triticoides Thurb. in S. Wats. Bot. 



Calif. 2: 326. 1880. 

 Elymus orcuttianus Vasey, Bot. Gaz. 10: 258. 1885. 

 Agropyron arenicola Davy in Tepson, Fl. West. Mid. Calif. 



76. 1901. 



Culms usually glaucous. 60-120 cm. tall, usually 

 in large masses, from extensively creeping, scaly 

 rhizomes; sheaths smooth or scabrous; blades nar- 

 row, mostly 2-6 mm. wide, flat or soon involute ; 

 spike erect, slender, sometimes branched; glumes 

 subulate, 10-14 mm. long, lemmas 6-10 mm. long, 

 glabrous, brownish or tawny, short-pointed. 



Moist bottom land and alkaline soil, in the Upper Sonoran 

 Zone; Washington to California, east to Colorado and Ari- 

 zona. June-July. Type locality: Rocky Mountains. 



Elymus triticoides pubescens Hitchc. in Jepson, Fl. Calif. 

 1: 186. 1912. Sheaths and involute blades hirsute-pubescent. 

 Only known from the type collection, Griffin, California 

 (Elmer). 



5. Elymus arenicola Scribn. & Smith. 



Sand Rye-grass. 



Fig. 



593. 



Elymus arenicola Scribn. &• Smith, U. S. Dept. Agr. Div. 

 Agrost. Circ. 9: 7. 1899. 



Perennial, with creeping rhizomes; culms erect. 

 smooth, 60-120 cm. tall; sheaths smooth; blades 

 firm, scabrous above, glabrous beneath, 2-4 mm. 

 wide; spike slender, nodding, 10-25 cm. long, the 

 spikelets often solitary, the lower rather distant; 

 spikelets about 2 cm. long, several-flowered; glumes 

 about 1 cm. long, glabrous; lemmas short pubescent 

 at least toward base, about 1 cm. long. 



Sandy river bottoms and alkali meadows in the Upper 

 Sonoran Zone; eastern Washington and Oregon to Idaho. 

 May-July. Type locality: Suferts, Oregon. 



