FESTUCE.E. 577 



scabrous, as long as its ghime or shorter. A very variable and 

 puzzling species. 



Oregon, Howell; California. Pringle in 1881, Parish 588. 



Utah. Wvoniiug. Oregon, California, and vicinity. 



9. A. Nevadensis (Vasey). P. Xevadensis Vasey, Bull. Torr. 

 Club, 10:66 (1883). 



An erect light-green or glaucous perennial, 50-80 cm. high; 

 culms and leaves often s(;abrous, sometimes, if not always, dioecious. 

 Second sheath from the top longer tlian the internode, or half as 

 long on plants of the same height; ligule obtuse or acute, firm, 2-3 

 mm. long; blades couduplicate or flat, those of sterile shoots 10-30 

 cm. long, about 2 mm. wide, the point often long and narrow, 

 those of the culm 2-3 in number, erect, the u^^per 5-20 cm. long. 

 Panicle linear or slightly spreading, rather densely flowered, 10-20 

 cm. long, many of the rays single, but some near the middle in threes 

 or fours, the longest 5-7 cm. long, flower-bearing on the upper 

 third to two-thirds. Spikelets linear, linear-lanceolate oi" oval, 

 3-8-flowered, 6-12 mm. long, a long joint of rachilla, 1.3-1.7 mm. 

 long; empty glumes scabrid, subequal, or the second usually the 

 longer, 3-nerved, first ovate-lanceolate to elli})tical, 3-5 mm. long, 

 second oval-lanceolate to oval, 3.2-G mm. long; floral glume sca- 

 brid, oval, narrowly elliptical, with a few short hairs at the base, 

 purple and yellowish brown above, 4-5.2 mm. long, apex often 

 erose and with a mucro, the 4 lateral nerves extending two-thirds 

 the distance from base to apex; palea linear, 2-toothed, scabrid, 

 ciliate on the keels, 3.5-4.2 mm. long. The above is the result of 

 careful measurements in all the details of nine different plants; no 

 two are alike in all important respects. I must either make each 

 a variety, or rather prefer for the present to make no varieties. It 

 shades off into A. IcBvis. 



Montana, Scrihner for U. S. Dept. Agricul. 658, Willianis 

 579; Xevada, Jo;?e.y; Oregon, Howell. 



Utah, Nevada. IMontana to Oregon. 



10. A. laevis (Vasey). Poa hen's Vasey, Contrib. U. S. Xat. 

 Herb. 1: 273 (1893), not Borb. (1877). 



A tufted rather slender perennial, 30-80 cm. high, with creep- 



