PIPER FLORA OF THE STATE OF WASHINGTON. 123 



Range: California to Washington and Montana. 



Specimens examined; Pullman, Elmer 1011; Piper 1744; Horner 879; Steptoe, Vaaey, 

 June, 1900; without locality, Sandberg cf- Leiberg 488. 



Tlie following specimens are doubtfully referred here; Coupeville, Gardner 342; Seattle, 

 Stnith 829; Kitsap County, Piper 821. 



Zonal distribution; Transition. 



4. Merathrepta americana (Scribn.). 



Danthonia americana Scribn. U. S. Dept. Agr. Div. Agrost. Circ. 30: 5. 1901. 



Danthonia grandilhra Philippi, Anal. Univ. Chil. 568. 1873, not Hochst. 1851. 



Type locality; Chile. 



Range; British Columbia to California. Chile. 



Specimens examined; Montesano, ZZeZZer 3908; Falcon Valle}^ iS'uir.s Jo// 150. 



Zonal distribution; Transition. 



5. Merathrepta unispicata (Thurb.). 



Danthonia unispicata Thurb. in S. Wats. Bot. Cal. 2: 294. 1880. 

 Type locality: "From San Diego to San Francisco," California. 

 Range; Washington to California. 



Specimens examined; Spokane, Piper 2599; without locality, Geyer 189; Pullman, 

 Elmer 1327; Brodie, June, 1898. 



Zonal distribution: Arid Transition. 



AVENA. 



1. Avena fatua glabrata Petermann, Flora des Bienitz 13. 1841. Smooth wild oat. 

 Avena fatua glabrescens Voss. Fl. Alg. 113. 1864-67. 

 Type locality: Not determined. 



Range; Introduced on the Pacific coast, especially in Washington, Oregon, and Idaho- 

 Specimens examined; Tacoma, Piper, July 5, 1897; Pullman, Piper, July 2, 1894. 



DESCHAMPSIA. 

 Lower glume 1-nerved. 



Glumes not longer than the florets 1. D. cespitosa. 



Glumes longer than the florets 2. D. atropurpiirea. 



Lower glume 3-nerved. 



Annual ; glumes 5 to 7 mm. long 3. D. cahjcina. 



Perennial; glumes 3 to 4 mm. long 4. D. elongata. 



1. Deschampsia cespitosa (L.) Beauv. Agrost. 91, 160. 1812. 

 Aira cespitom L. Sp. PI. 1: 64. 1753. 



Type locality; Europe. 



Range: Alaska to Labrador south to California, Ai-izona, Illinois, and New Jei-sey. Eu- 

 rope, Asia. 



Specimens examined: Olympic Mountains, Elmer 1665; Sumas Prairie, Lyall in 1858-9; 

 Seattle, Smith 858; Gray's Harbor, Henderson, June, 1892; Fort Vancouver, Garry in 1826; 

 Railroad Creek, Elmer 718; Wenache River, Whited; Spokane, Piper, September, 1896; 

 Pullman, Piper 1749; Steptoe, Vasey 12; Pend Oreille River, Lyall in 1861; Waitsburg, 

 Horner .509; Lake Kalispel, Kreager 328; Lake Chelan, Vasey 24; without locality, Vasey 367. 



Zonal distribution; Transition. 



2. Deschampsia atropurpurea (Wahl.) Scheele, Flora 27: 56. 1844. 

 Aira atropurpurea Wahl. Fl. Lapp. 37. 1812. 



Aira latifolia Hook. Fl. Bor. Am. 2: 243. 1840. 



Deschampsia atrojmrpitrea latifolia Scribn. in Macoun, Cat. Can. PI. 2: 209. 1888. 



Type locality: Finmark. 



