LAMSON-SCRIBNER AND MKRRILL GRASSES OF ALASKA. 89 



Specimens examined: Revillagigedo Island, Howell 1723; Juneau, Coville 6c Kear- 

 ney 2491, Cole in 1899. 



This species is related to Elymus virescens Piper, but is distinguished by its much 

 larger size, larger spikelets, and usually pubescent nodes. 



2. Elymus glaucus maximus Davy in Jepson, Fl. Mid. West. Calif. 79. 1901. 

 Elymus americanus Vasey & Scribn.; Macoun, Cat, Can. PI. 4: 245. 1888, nom. nud. 

 A rather stout glabrous perennial, 90 to 150 cm. high, with broad, lanceolate leaves, 



densely flowered spikes about 15 cm. long, and long-awned spikelets; lemmas gla- 

 brous or scabrous, bearing a terminal awn, ! to 2 cm. in length. 



In dry or damp, usually shady soils, southeastern Alaska, southward to California. 



Specimen examined: Sitka, Wright 1587. 



There is in the U. S. National Herbarium a fragmentary specimen from Fort Yukon, 

 collected by O. S. Bates in 1889, that is apparently undescribed, differing from the 

 above in its subulate glumes and strigose-pubescent lemmas, in this latter respect 

 approaching Elymus sibiricus L. It is most closely related to Elymus macounii Vasey. 



3. Elymus borealis Scribn. U. S. Dept. Agr. Div. Agrost. Circ. 27: 9. 1900. 



Alaskan ryegrass. 



Elymus ciliatus Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 11: 57. pi. 16. 1898, 

 not Muhl. 1817. 



A rather slender, erect perennial about 70 cm. high, with soft, flat leaves and slender, 

 nodding spikes 7 to 12 cm. long; spikelets 1.5 cm. long; lemmas about 1 cm. long, 

 ciliate-pubescent along the margins, especially near the apex, bearing a nearly 

 straight awn 2 to 2.5 cm. long. 



In damp soil, Yakutat Bay, southward to the Olympic Mountains, Washington. 



Specimens examined: Sitka, Evans 210 (type), 798; Juneau, Cole in 1899, Coville 

 ct- Kearney 2475, Piper 4661; Yes Bay, Behm Canal, Howell 1724; Yakutat, Piper 

 4662. 



A peculiar species, at once recognized by its ciliate lemmas. It is related to 

 Elymus sibiricus L., to which Trinius" referred it. Most if not all of the material in 

 Alaskan collections named Elymus sibiricus should be referred to E. borealis. 



4. Elymus innovatus Heal, Grasses N. Amer. 2: 650. 1896. 



Elymus mollis R. 15r. in Richards. Bot. App. Frankl. Journ. 732. 1823, not Trin. 1821. 



Elymus brownei Scribn. & Smith, U. S. Dept. Agr. Div. Agrost. Bull. 8: 7. pi. 4- 

 1897. 



A rigid, rather slender, erect perennial, 50 to 90 cm. high, with numerous basal 

 leaves, short cauline leaves and densely flowered, pubescent spikes 4 to 10 cm. long; 

 glumes short, subulate; lemmas densely pubescent, short awn-pointed. 



Gravelly or sandy banks, arctic Alaska, southward in the interior to Wyoming and 

 South Dakota. 



Specimens examined: Chandlar (Gens de Large) River, Camp 6, Schrader in 1899; 

 Cape Smythe, Schrader in 1901. 



5. Elymus villosissimus Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 11: 56. 1898. 



A stout, erect perennial, 30 to 40 cm. high, from a strong creeping rootstock, with 

 rather broad, flat leaves and short, densely flowered spikes, 5 to 8 cm. long; spikelets 

 3 to 5-flowered, with densely villous lemmas, the narrowly lanceolate and subulate- 

 pointed glumes nearly equaling the spikelet. 



Aleutian and Pribilof islands. 



Specimens examined: Wrangell Island, Hooper in 1881; St. Paul Island, Macoun 

 16226. 



"In Bong. Mem. Acad. St. Petersb. VI. Math. Phys. Nat. 2: 174. 1832. 

 19208—10 4 



