o36 Rvdberg : Rocky Mountain flora 



This is closely related to the European P. iicmoralis, but dif- 

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

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

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

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



Wyoming: Big Horn Mountains, July, 1899,/^ Tiveedy 2141, 

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

 1897, F. Tweedy 101. 



Idaho: Northern Idaho, 1892,/. H. Sandberg jyj. 



Distichlis dentata sp. nov. 



Perennial, with a creeping branched scaly rootstock ; stem 1- 

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

 wide, fiat or slightly involute ; panicle of the pistillate plant 4-8 

 cm. long, 2-2.5 cm - 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 

 of D. tlialassica, but lacks the loose sheaths of that species. The 

 latter lacks the dentation of the palet characteristic of D. dentata. 



Washington : 1 893, Sandberg & Leiberg 4.6J ( 9 , type, in herb. 

 Columbia Univ.) ; Okanagon Valley, 1897, Elmer 308 (9.) 



Oregon: Wild Horse Meadow, Southeastern Oregon, 1901, 

 Griffiths & Morris 504. (o 71 ). 



Saskatchewan : Carlton House, Richardson 28 (Franklin's 

 Second Journ.). 



Nevada: Pleasant Valley, 1865, Stretch 20j (cT); Carson, 



Festuca saximontana sp. nov. 



? Festnca ovina pseudovina Beal, Grasses N. Am. 2 : 595. 1896. 

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

 Not F. pseudovina Hack. 1880. 



