142 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Awns shorter than or scarcely exceeding the broad lemma. 



Awns minute or wanting 15. B. brizaeformis. 



Awn well developed. 



Panicle dense, small 16. JS. Aordeaccus. 



Panicle loose, open. 



Awn twisted and divaricate 17. B. japonieus. 



Awn straight. 



Margins of the lemma inrolled in fruit 18. B. secalinus. 



Margins of the le:ntna not inrolled in fruit. 19. B. raceinosus. 



1. Bromus subvelutinus Shear, U. S. Dept. Agr. Div. Agrost. Bull. 23 : .52. 1900. 

 Type locality: Reno, Nevada. 



Range: Washington to Nevada and California. 

 Specimens examined: North Yakima, Hunter 596. 

 Zonal distribution: Upper Sonoran. 



2. Bromus marginatus Nees; Steud. Syn. PI. Glum. 1: 322. 1854. 



Type locality: "Douglas legit ad flu v. Columbia, St. Louis." This is some undeter- 

 mined point on the Columbia River. 



Range: British Columbia to Arizona and Colorado. 



Specimens examined: Fairhaven, Piper 2607; Whidby Island, Gardner 329] Wenache 

 Lake, Vasey 103; Wenache, Whited 4; Wenache Mountains, Whited 1359; Skamania 

 County, Flett 1391; Klickitat River, Flett 1391; EUensburg, Whited 440; Union Gap, 

 Yakima River, Cotton 448; Tieton River, Cotton 484; Blue Mountains, Piper, 2565, July 

 15, 1896; Salmon River, Homer 511; Cold Creek, Cotton 401; Steptoe, Vasey in 1901; 

 Walla Walla, Shear 1593; Klickitat County, Suksdorf 174; Yakima, Leckenby m 1898. 



Zonal distribution: Transition mostly. 



This species has commonly but erroneously been called B. breviaristatua Hook. 



2a. Bromus marginatus seminudus Shear, U. S. Dept. Agr. Div. Agrost. Bull. 23: 

 55. 1900. 



Type locality: "On open mountain side 5 miles above Wallowa Lake, Oregon." 

 Collected by Shear. 



Range: Washington to Montana, south to California and Utah. 



Specimens examined: Olympic Mountains, Piper 1990; Elmer 1956; Montesano, 

 Heller 3979. 



Zonal distribution: Transition and Canadian. 



2b. Bromus marginatus latior Shear, U. S. Dept. Agr. Div. Agrost. Bull. 23: 55. 1900. 



Type locality: "Walla Walla, Washington." Collected by Shear. 



Range: Washington to Wyoming, south to New Mexico and Arizona. 



Specimens examined: Olympic Mountains, Elmer 1958; EUensburg, Piper, July 9, 

 1897; Yakima, Leckenby, June 20, 1898; Steptoe, Vasey 23; Pullman, Piper 1738; Walla 

 Walla, Shear 1615. 



Zonal distribution: Arid Transition. 



3. Bromus sitchensis Trin. in Bong. Mem. Acad. St. Petersb. VL 2: 173. 1832. 

 Type locality: Sitka. 



Range: Washington to Alaska along the coast. 



Specimens examined: Olympic Mountains, J. M. Grant, in 1889; Seattle, Piper 3014, 

 3013; Puyallup, Piper, September 2, 1899; Cascade Mountains, Lyall, in 1859. 

 Zonal distribution: Humid Transition. 



4. Bromus caritiatus Hook. & Arn. Bot. Beech. Voy. 403. 1841. 

 Bromus hookerianus minor Scribner; Beal, Grasses N. Am. 2: 614. 1896. 

 Type locality: California. 



Range: California to Washington and Idaho. 



