GRASS FAMILY 



251 



9. Elymus virescens Piper. 

 Pacific Rye-grass. Fig. 597. 



Elyiniis 7'ircsce)is Piper, Erythea 7: 101. 1899. 



Elymus hozvcllii Scribn. & Merr. Contr. U. S. Nat. Herb. 13: 



88. 1910. 

 Elymus stiigatus St. John, Rhodora 17: 102. 1915. 



Culms tufted smooth, 30-120 cm. tall ; sheaths 

 smooth ; blades flat, smooth or scabrous, 5-20 cm. 

 long, 5-10 mm. wide; spike 5-15 cm. long, rather 

 dense ; spikelets few-flowered ; glumes firm, lanceo- 

 late, acute or acuminate, strongly nerved, the nerves 

 often scabrous, 10-15 mm. long; lemmas firm, 

 rounded on the bark, scarcely nerved, awnless or 

 short-awned. 



Damp soil, in woods or open ground, in the Humid Tran- 

 sition Zone; southern Alaska to Mendocino County, Cali- 

 fornia. May-Aug. Type locality: Olympic Mountains. 



J 



10. Elymus hirsiatus Presl. 

 Northern Rye-grass. Fig. 598. 



i£./^''?^:'^^\"-' 



Elynliis hirsutus Presl, Rel. Haenk. 1: 264. 1830. 



Elymus ciliatus Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 



U: 57. pL 16. 1898, not Muhl. 1817. 

 Elx'iius borcalis Scribn. U. S. Dept. Agr. Div. Agrost. Circ. 

 "27: 9. 1900. 



Culms tufted erect, or geniculate at base, smooth, 

 1-1.5 meters tall; sheaths smooth; blades flat, thin, 

 lax, rather sparsely pilose above, scabrous beneath, 

 15-20 cm. long, 5-12 mm. wide; spike loosely flowered, 

 nodding, 10-15 cm. long; glumes lanceolate, strongly 

 nerved, scabrous, extending into a short awn or into 

 an awn as long as the body ; lemmas rather thin, 

 nerved, ciliate-margined, awned, the awn as much as 

 2 cm. long. 



Moist woods in the Hudsonian Zone; southern Alaska to 

 Oregon (Gearhart, Chase). June-Aug. Type locality: Nootka 

 Sound. 



11. Elymus macoianii \'asey. 

 Alacoun's Rye-grass. Fig. 599. 



Elymus macouuii Vasey, Bull. Torrey Club 13: 119. 1886. 



Culms tufted, erect, slender, smooth, 50-100 cm. tall; 

 sheaths smooth ; blades usually scabrous on both surfaces, 

 erect and rather firm, 10-20 cm. long, 2-5 tum. wide ; spike 

 slender, erect or somewhat nodding, 4-10 cm. long, about 

 5 mm. thick ; glumes narrowly lanceolate, scabrous, about 

 1 cm. long, extending into a short awn ; lemmas smooth 

 and rounded below, scabrous toward the apex, extending 

 into a slender straight awn 1-1.5 cm. long. 



Meadows and open ground, in the Arid Transition and Upper 

 Sonoran Zones; eastern Washington, Oregon, and California 

 (Klamath, Copcland; Donner Creek, Hitchcock), north to Alberta, 

 east to Minnesota and New Mexico. June-Aug. Type locality: 

 Great Plains of British America. 



