150 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
SPECIMENS EXAMINED: Olympic Mountains, F’lett 830; Fairhaven, Piper 2603; Seattle, 
Smith 803; Tacoma, Flett 45, Leckenby; Columbia River, 46° to 49°, Lyall in 1860; Step- 
toe, Vasey 16; without locality, Sandberg & Leiberg 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. 
Tyre Locatiry: Near Lexington, Morrow County, Oregon. 
Rance: Washington to California. 
SPECIMENS EXAMINED: Klickitat County, Suksdorf in 1886; Washtuena, Cotton 990. 
Collected by Leiberg. 
6. Hordeum boreale Scribn. & Smith, U.S. Dept. Agr. Div. Agrost. Bull. 4: 24. 1897. 
Tyre Locauity: ‘ 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. Veg. ed. 3. 2: 172. 1796. 
Tyee Locatity: Piedmont, Italy. 
SPECIMENS EXAMINED: Seattle, Smith 814; Dry Creek, Whitman County, Vasey 52; 
Waitsburg, Horner 247; Walla Walla, Leckenby, May 19, 1898, Griffith & Cotion 556. 
ELYMUS. Ryecacrass. 
Annual; glumes rigid, spreading . EB. caput-medusae. 
Perennials. 
Tufted grasses without rootstocks. 
Culms stout, 1 to 2 meters high. 
Spikelets 1 to 1.5m. long, usually glabrous or scabrous. 9. E, condensatus. 
Spikelets 2 to 3 cm. long, pubescent .........-.-.-- 10. EF, arenarius. 
Culms slender, seldom 1 meter high. 
Lemma pubescent; spike nodding .....-.....-.---- 2. L. 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 ', aristatus. 
Glumes lanceolate. 
Awns of lemma well developed. 
Spikes dense; lemma not ciliate 
Spikes usuallyinterrupted;lemmaciliate. 6. 
Awns of lemma short or obsolete. 
Glumes rigid, longer than the spikelet.. 7. 
Glumes not rigid, shorter than the spike- 
'. glaucus. 
). borealis. 
. virginicus. 
LC 8. FE. virescens. 
Not tufted but spreading by long rootstocks. 
Lemmas long-villous ...........---.------------------ 11. FE. flavescens. 
Lemmas not Jong-villous. 
Spike dense; lemma scabrous-puberulent; giumes 
sparsely hirsute .......-.-2-.-.-2--2-.-.-------- 12. BF. vancouverensis. 
Spike not dense; glumes not hirsute. 
Lemma glabrous, usually glaucous ........----- 13. E. iriticoides. 
Lemma puberulent......-.2.-.-.-.----------- 14. F. arenicola. 
