150 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined: Olympic Mountains, Flett 830; Fairhaven, PiTper 2603; Seattle, 

 Smith 803; Tacoma, Flelt 45, Lechenhy; Columbia River, 46° to 49°, LyaU in 1860; Step- 

 toe, Vasey 16; without locality, Sahdberg cfc Lriberg 245; Box Canyon, Pend Oreille River, 

 Kreager 433. 



Zonal distribution: Transition. 



5a. Hordeum nodosum depressum Scribn. & Smith, U. S. Dept. Agr. Div. Agrost. 

 Bull. 4: 24. 1897. 

 Type uxiality: Near Lexington, Morrow County, Oregon. Collected by Ijeiberg. 

 Ra}jge: Washington to California. 

 Specimens examined: Klickitat County, Suksdotfin 1886; Washtucna, Cotton 990. 



6. Hordeum boreale Scribn. & Smith, U. S. Dept. Agr. Div. Agrost. Bull. 4: 24. 1897. 

 Type ux-ality: "Aleutian Islands and Alaska to Oregon and California." 



Range: Alaska to California. 



Specimens examined: Pullman, Piper 1747; Steptoe, Vasey, July 2, 1901; Kittitas 

 County, Vasey 49; west Klickitat County, Suksdorf 1168. 

 Zonal distribution: Transition. 



7. Hordeum geniculatum All. Fl. Ped. 2: 259. 1785. 



Hordeum maritimum With. Bot. Arr. Brit. V^. ed. 3. 2: 172. 1796. 

 Type locality: Piedmont, Italy. 



Specimens examined: Seattle, Smith 814; Dry Creek, Whitman County, Vasey 52; 

 Waitsburg, Homer 247; Walla Walla, Uckenhy, May 19, 1898, Griffith db Cotton 656. 



ELTMUS. Ryegrass. 



Annual ; glumes rigid, spreading I.E. caput-medusae 



Perennials. 



Tufted grasses without root.stock.s. 

 Culms stout, 1 to 2 meters high. 



Spikelets 1 to 1.5cm. long, usually glabrous or scabrous. 9. E. condensatus. 



Spikelets 2 to 3 cm. long, pubescent 10. E. arenarius. 



Culms slender, seldom 1 meter high. 



Lemma pubescent; spike nodding 2. E. canadensis. 



Lemma not pubescent; spike erect. 

 Glumes subulate. 



Awns of lemma 30 to 40 mm. long 3. E. leckenbyi. 



Awns of lemma 3 to 5 mm. long 4. E. aristatus. 



Glumes lanceolate. 



Awns of lemma well developed. 



Spikes dense; lemma not ciliate 5. E. glaucus. 



Spikes usually interrupted; lemma ciliate. 6. E. horealis. 

 Awns of lemma short or obsolete. 



Glumes rigid, longer than the spikelet.. 7. E. rnrginicus. 

 Glumes not rigid, shorter than the spike- 

 let 8..E. virescens. 



Not tufted but spreading by long rootstocks. 



Lemmas long-villous 11. E.favescens. 



Lemmas not long-villous. 



Spike dense; lemma scabrous-puberulent; glumes 



sparsely hirsute 12. E. vancouverensis. 



Spike not dense; glumes not hirsute. 



Lemma glabrous, usually glaucous 13. £■. trilicoides. 



Lemma puberulent *. 14. E. arenicola. 



