136 CONTEIBUTIONS FROM THE NATIONAL HERBARIUM. 



Blades at length deciduous from the persisting sheaths 11. F. hallii. 



Blades not deciduous from the sheaths. 



Plant producing short rootstocks or stolons 1 . F. ruhra. 



Plant not producing rootstocks or stolons. 



Awns longer than the lemma; ovary hispidulous at 



apex 8. F. occidentalis. 



Awns not longer than the lemma; ovary glabrous. 

 Leaves closely involute, firm; awns usually well 



developed 9. F. orina. 



Leaves closely involute; awns very short, or 



none 10. F. riridula. 



Plants with flat broad leaves, not densely tufted. 



Lemma indurated, not at all keeled 12. F. datior. 



Lemma membranous, keeled below. 



Florets stipitate at base 13. F. suhuliftora. 



Florets not stipitate at base 14. F. suhulata. 



1. Festuca octoflora Walt. Fl. Car. 81. 1788. 

 Festuca ienella Willd. Sp. PI. 1: 419. 1797. 

 Type locality: Carolina. 



Range: Throughout most of temperate North America. 



Specimens examined: Douglas County, SpiUman, May 27, 1896; Wilson Creek, Sand- 

 berg & Leiberg, July, 1893; Wenache, Whited, July, 189G; Columbia River, 46° to 49°, 

 Lyall in 1860; North Yakima, Henderson 2193; Prcsser, LecJcenby, May 2, 1898; Sunny- 

 side, Cotton 355; Rattlesnake Mountains, Cotton 410; Pasco, Piper, May 26, 1899; Spokane, 

 Leclcenhy, June 2, 1898; Marshall Junction, Piper 2279; Steptoe, Vasey, May, 1900; with- 

 out locality, Vasey in 1889; Spokane, Kreager 3; Coulee City, Piper 3914. 



Zonal distribution: Upper Sonoran and Tiansition. 



2. Festuca pacifica Piper, Contr. Nat. Herb. 10: 12. 1906. 

 Type locality: Pullman, Washington. 



Range: British Columbia to California and Arizona. 



Specimens examined: Klickitat County, Sitksdoif 1139; Olympia, Henderson 2176; 

 Wenache, Whited 1228; North Yakima, Henderson 2174; Rattlesnake Mountains, Cotton 

 472; Pasco, Leckenhy, May, 1898; Rock Lake, Sandberg cD Leiberg, May, 1893; between 

 Coulee City and Waterville, SpiUman, May, 1886; Steptoe, Vasey in 1889; Pullman, Lal-e 

 & Hull 108; Piper 1754; Almota, Piper 1925; Coulee City, Piper 3913. 



Zonal distribution: Upper Sonoran and Arid Transition. 



This species has commonly been mistaken for the rare Californian F. microstachys Nutt 



3. Festuca confusa Piper, Contr. Nat. Herb. 10: 13. 1906. 

 Type locality: West Klickitat County, Washington. 

 Range: Washington to Cahfornia. 



Specimens examined: West Klickitat County, SwtsrZo// 1140. 

 Zonal distribution: Arid Transition. 



4. Festuca eriolepis Desv. in Gay, Fl. Chil. 6: 428. 1853. 

 Festuca arida Elmer, Bot. Gaz. 36: 52. 1903. 



Ti'PE locality: Chile. 



Range: W^ashington to Nevada and California, Chile. 



Specimens examined: North Yakima, Henderson 2196; Coulee City, Piper 3915. 



Zonal dlstribution : Upper Sonoran and Arid Transition. 



5. Festuca megalura Nutt. Journ. Acad. Piiiia. n. ser. 1: 188. 1847. 

 Festuca myuros hirsuta Asch. & Graebn. Syn. Mitteleur. Fl. 2: 558. 1901. 

 Vvlpia myuros hirsuta Hack. Cat. Gram. Port. 24. 1888. 



