MONTANA BOTANY NOTES 17 



of the forest of the eastern side of the Lake and by far the most 

 lumber. The trees grow close together in dense forests and are often 

 4 feet in diameter. They prefer moist soil on north slopes or along- bottoms 

 and extend up to about 5500 feet altitude or the limit of the Middle Temper- 

 ate zone. It is less common at Dayton, Hot Springs and McDonald peak 

 than at Bigfork. Common in the Sparry Glacier region. Not seen on the 

 upper Bitter Root. 



Potamogeton Friesii Ruprecht. Poison Swamp. 



Andropogon scoparius Mx. Dayton. This is the first time it has been 

 reported west of the Atlantic slope. 



Stipa minor (Vascy) Scribner. Common on iow prairies Bigfork and Wild 

 Horse Island. 



Stipa Nelson! Seribner. Monida, Alta, Blackfoot Glacier. 

 Agrostis exarta Trin. Alta, Belton. 

 Polypogon iVlonspeliensis (L.) Desf. Ravalli. 

 Calamagrostis neglecta (Ehrh.) Gaertn. Evaro, Alta. 



Calamagrostis blanda Beal. Daphnia Dake at Bigfork. Too close to C. 

 Canadensis. 



Calamagrostis rubescens Buckley. Bigfork, Swan Lake, Bull Island. 

 Trisetum cernuum Trin. Bigfork, Swan Lake. 

 Trisetum canescens Buckley. Bigfork, Alta, Ev^aro. 

 Deschampsia calycina Presl. Ronan. 

 Spartina gracilis Trin. Poison. 

 Poa purpurascens Vasey. Sperry Glacier. 

 Poa reflexa V. & S. Sperry Glacier. 

 Poa alpicola Nash. Blackfoot Glacier. 

 Poa leptocoma Trin. Blackfoot Glacier. 

 Poa pudica Rydberg. Blackfoot Glacier. 



Poa interior Rydberg. Sperry Glacier. A doubtful species. 

 Poa crocata Rydberg. Sperry Glacier. 

 Poa Lettermanni Vasey. Sperry Glacier. 

 Poa Howeiiii V. & S. Daphnia Lake at Bigfork. 

 Poa laevigata Seribner. Deer Lodge valley, Sperry Glacier. 

 Poa Nevadensis Vasey. Alta. 

 Poa brachyglossa Piper. Monida, Alta, Evaro. 

 Poa confusa Rydberg. Garrison. 



Poa Olyneyae Piper. McDonald Lake Mission Mts., Darby. 

 Poa acuminata Seribner. Lambert Valley. 

 Poa annua L. P^onan, Missoula, Lake McDonald. 



Glyceria elata (Nash PI. Mont. 54 (1900) as Panicularia). Bigfork. 

 Glyceria pauciflora Presl. Ronan, McDonald Lake in the Mission Mts. 

 Glyceria borealis Piper. Swan Lake, Bigfork, Yellow Bay, Upper Marias 

 Pass, Ronan. 



Glyceria flavescens n. sp. This is close to G". grandis, but shorter and 

 more rigid, stems 13 mm. thick at base, erect, 2.5-3 feet high not 

 creeping at base. Even the upper sheaths nearly as long as the inter- 

 nodes which are short, making the stems very leafy. Upper leaves 6 to 12 

 inches long and nearly 13 mm. wide, shortly acuminate, smooth except 

 on the scabrous edges, yellowish-green, a little paler below 'but not glau- 

 cous. Panicle scarcely exserted, obovate-cuneate, very dense, erect, with 

 several erect rays at each joint which branch repeatedly, only the upper 

 branches spreading. Spikelets linear-lanceolate, acute, about 11 mm. long, 

 about 5-flowered, grennish-yellowish. Glumes hyaline, white, turning tawny 

 with age, the upper 3-nerved at base. Lemma narrower and a trifle longer 

 and less scabrous than in G. grandis, not turning purple. This has the 

 habit of Phragmites and grows in large patches in bogs. Gathered at 

 Swan Lake Aug. 24, 1908 while G. grandis at the same place was all out 

 of bloom and even the seed fallen tw^o weeks earlier. It differs from 

 G. grandis in the swab-like panicle, lutescent flowers and leaves, broader 



