92 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



6. Poa reflexa Vasey and Scribn., Contrib. U. S. Natl. Herbarium 

 1:276. 1893. 

 San Francisco Peaks (Coconino County), 8,000 to 12,000 feet, 

 moist open meadows and stream banks, late June to August. Mon- 

 tana to eastern British Columbia, south to New Mexico and Arizona. 



7c Poa palustris L., Syst. Nat. ed. 10, 2: 874. 1759. 



Pinaleno Mountains, Graham County (Peebles et al. 4413). Mead- 

 ows and moist open ground, at low and medium altitudes. Newfound- 

 land and Quebec to Alaska, south to Virginia, Missouri, New Mexico, 

 Arizona, and California; Eurasia. 



8. Poa interior Kydb., Torrey Bot. Club Bui. 32: 604. 1905. 



San Francisco Peaks (Coconino County), 9,000 to 12,000 feet, moist 

 meadows, grassy slopes, and open woods, July to August. Quebec 

 to British Columbia, south to Vermont, Minnesota, New Mexico, and 

 Arizona. 



9. Poa fendleriana (Steud.) Vasey, U. S. Dept. Agr., Div. Bot. Bui. 



13 2 : pi. 74. 1893. 



Eragrostis fendleriana Steud., Syn. PL Glum. 1: 278. 1854. 

 Poa fendleriana arizonica Williams, U. S. Dept. Agr., Div. 

 Agrost. Cir. 10: 5. 1899. 



Apache County to Mohave County, south to Cochise and Pima 

 Counties, 3,500 to 9,000 feet, rocky slopes and open woods, April to 

 August. South Dakota to Idaho, south to western Texas, Arizona, 

 and southern California. 



Usually P. fendleriana is a tufted grass but sometimes produces 

 rhizomes. Typically the lemmas are pubescent on the keel and nerves, 

 but frequently forms occur with the lemmas nearly or entirely glabrous. 



10. Poa longiligula Scribn. and Williams, U. S. Dept. Agr., Div. 



Agrost. Cir. 9: 3. 1899. 



Coconino, Mohave, Yavapai, Gila, and Pinal Counties, 3,500 to 

 7,500 feet, rocky slopes and open woods, April to June. North Dakota 

 to Oregon, south to New Mexico, Arizona, and California. 



This species very closely resembles P. fendleriana, differing in having 

 a long conspicuous ligule. 



11. Poa rupicola Nash, N. Y. Bot. Gard. Mem. 1: 49. 1900. 



San Francisco Peaks (Coconino County), 11,500 to 12,500 feet, 

 alpine meadows and rocky slopes above timber line, August to Septem- 

 ber. Montana to Oregon, south to Arizona and California. 



Similar in appearance to P. interior but usually smaller and the florets 

 without a cobweb at base. 



12. Poa nevadensis Vasey in Scribn., Torrey Bot, Club Bui. 10: 



66. 1883. 



Without locality (Pringle 44 and 133). Wet places, Montana to 

 Yukon Territory and Washington, south to Colorado, Arizona, and 

 California. 



Pringle's specimens are not the typical form, differing in having 

 shorter and relatively broader blades. The ligule is long, as in the 

 common form. 



