536 Rydberg : Rocky Mountain flora 



This is closely related to the European P. iienioralis^ but dif- 

 fers in the truncate Iigules,the smaller spikelets, and more strongly 

 nerved empty glumes. It has the narrow inflorescence and nar- 

 row empty glumes of P, nemoralis and thereby differs from P. in- 

 terior, which also has been confused with the European relative. 



Wyoming: Big Horn Mountains, July, 1899, /^ Tzveedy 21^1, 

 (type, in herb. N. Y. Bot. Gard.) ; Gros Ventre River, Aug., 

 1897, F. Tzveedy 10 1. 



Idaho : 



LH. 



Distichlis dentata sp. nov. 



Perennial, with a creeping branched scaly rootstock ; stem i— 

 3 dm. high, very leafy; leaf-blades 5-12 cm, long, 2-3.5 "^"^■ 

 wide, flat or shghtly involute ; panicle of the pistillate plant 4-8 

 cm. long, 2-2.5 ^^- wide ; spikelets 1-2 cm. long, 5-8 mm. wide, 

 7-17-flowered ; empty glumes lanceolate, about 5 mm. long, 

 short-acuminate, scarious-margined ; floral glume ovate in lateral 

 view, 6 mm. long, fully 2 mm. wide from keel to margin, short- 

 acuminate ; palet nearly as long, dentate on the keels ; panicle of 

 the staminate plant looser, 5-10 cm, long; spikelets more com- 

 pressed, floral glumes lanceolate in lateral view, straw-colored, 

 acute, thin. 



This species differs from D, spicata and D, stricta in the broader 

 leaves, larger and broader spikelets, larger and broader floral 

 glumes and palets in the pistillate plant, and the distinct dentation 

 on the keels of the latter. It has the broad leaves and the habit 

 o{ D. thalassica, but lacks the loose sheaths of that species. The 

 latter lacks the dentation of the palet characteristic of Z>. dentata. 



Washington : 1 893 , Sandberg & Leiberg 463 ( 9 , type, in herb. 

 Columbia Univ.); Okanagon Valley, 1897, Elmer s 08 (?.) 



Oregon: Wild Horse Meadow, Southeastern Oregon, 1901, 

 Griffiths & Morris 504. (c?). 



Saskatchewan : Carlton House, Richardson 28 (Franklin's 



J 



248 (?). 



Valley, 1865, Stretch 20J (&) 



Festuca saximontana sp. nov. 



? Festiica ovina pseudozdna Beal, Grasses N. Am, 2 : 595. 1896, 

 Festuca pseudozdna Rydb. Mem. N. Y. Bot. Gard, 1 : 56. 1900. 

 Not F. pseudozdna Hack. 18 80. 



