136 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



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



Blades not deciduous from the sheaths. ^ 



Plant producing short rootsf ocks or stolons 7- F. rubra. 



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. otina. 



Leaves closely involute; awns very .short, or 



none 10. F. inridrda. 



Plants with flat broad leaves, not densely tufted. 



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



Lemma membranous, keeled below. 



Florets stipitate at base .• 13. F. .tubvlifora. 



Florets not stipitate at base 14. F. subiilata. 



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

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

 Type localitt: Carolina. 



Range: Throughout most of temperate North America. 



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

 herg cfe Leiberg, July, 1893; Wenache, Whited, July, 189G; Columbia River, 46° to 49°, 

 Lyall in 1860; North Yakima, Ilendermn 2193; Prosser, Leckenby, May 2, 1898; Sunny- 

 side, Co»on 355; Rattlesnake Mountains, To/ton 410; Pasco, Pi>cr, May 26, 1899; wSpokane, 

 Leckenby, June 2, 1898; Marshall Junction, Piper 2279;"Steptoe, Vasey, May, 19(K); with- 

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



Zonal distribution: Upper Sonoran and Transition. 



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, Suksdorf 1139; Olympia, Henderson 2176; 

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

 472; Fsisco, Leckenby, May, 1898; Rock Lake, Sandberg & Leiberg, May, 1893; between 

 Coulee City and Waterville, Spillman, May, 1896; Steptoe, Vasey in 1889; Pullman, Lake 

 & 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 California. 



Specimens examined: W>st Klickitat County, iSwitsJor/ 1140. 

 Zonal distribution: Arid Transition. 



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

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



Type locality: Chile. 



Range: Washington to Nevada and California, Chile. 



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



Zonal distribution: Upper Sonoran and Arid Transition. 



6. Festuca megalura Nutt. Journ. Acad. Phila. n. ser. 1: 188. 1847. 

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

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



