r 



Rydberg: Rocky Mountain flora 533 



Beschampsia confinis (Vasey) sp. nov. 



Deschampsia caespitosa confinis Vasey ; Beal, Grasses N. Am. 

 2 : 369. 1896. 



The only character given by Professor Beal is the unusual 

 length of the Hgules. To this should be added a narrow inflo- 

 rescence with strongly ascending branches and a long awn inserted 

 near the base o{ the floral glume. I think that these characters 

 make the plant specifically distinct from D. caespitosa, D. 

 confinis ranges from southern Utah and Arizona to southern 

 California. 



Sphenopholis intermedia (Rydb.) comb. nov. 



Koeleria truncata major Toxx. Fl. U. S. i : 117. 1824. 

 Eatonia interniedia Rydb. Bull. Torrey Club 32 : 602. 1905. 

 Sphenopholis pallens major Scribn. Rhodora 8 : 145. 1906. 



F 



Poa callida sp. nov. 



Perennial, with a creeping rootstock ; stem 3-5 dm. high, 

 somewhat flexuose, striate and glabrous ; hgules lanceolate, long- 

 attenuate, 5-6 mm. long; leaf-blades flat, flaccid, 5-12 cm. long, 

 about 3 mm. wide, smooth ; sheaths exceeding the internodes ; 

 panicle open, 1-1.5 dm. long; branches spreading or reflexed, 

 scabrous ; the lower ones in 4's to 6's, 5-7 cm, long, spikelet-bearing 

 above the middle ; spikelets about 3 mm. long, 2- or 3-flowered, 

 light green, strongly compressed ; first empty glume subulate, 

 I-nerved, 2 mm. long; the second slightly broader, 3-nerved, 

 2.5 mm. long, glabrous; floral glumes 3 mm. long, strongly 5- 

 nerved, acuminate, glabrous except the keel, which is sh'ghtly 

 silky below ; cobweb scant but long. 



This species is related to Poa occidentalis Vasey, but is a 

 weaker and more flaccid plant, has very long and conspicuous 

 ligules, narrow flowering glumes, which are still rnore strongly 

 nerved. The spikelets resemble those of P. neri'osa, but are 

 smaller ; the floral glumes are smooth and with a distinct cobweb. 

 The type was named P. serotina, which also it resembles, but in 

 that species the floral glumes are less compressed, with obsolete 



intermediate nerves. 



Montana: Warm Springs, Helena, July 13, l^gS, Rydberg 



214.J (type, In herb. Columbia Univ.). 



