Rydberg : Rocky Mountain flora 533 



Deschampsia confinis (Vasey) sp. nov. 



Dcscliainpsia caespitosa coiijiiiis Vasey ; Beal, Grasses N. Am. 

 2 : 369. 1896. 



The only character given by Professor Beal is the unusual 

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

 rescence with strongly ascending branches and a long awn inserted 

 near the base of the floral glume. I think that these characters 

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

 confi)iis ranges from southern Utah and Arizona to southern 

 California. 



Sphenopholis intermedia (Rydb.) comb. nov. 



Kocleria tnincata ji/ajor Torr. Fl. U. S. i : 117. 1824. 



Ea to Ilia inter media Rydb. Bull. Torrey Club 32: 602. 1905. 



Sphoiop/iolis palle lis major ScYxhn. Rhodora 8 : 145. 1906. 



Poa callida sp. nov. 



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

 somewhat flexuose, striate and glabrous ; ligules 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, i — 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 slightly 

 silky below ; cobweb scant but long. 



This species is related to Poa oceidenta/is Vasey, but is a 

 weaker and more flaccid plant, has very long and conspicuous 

 ligules, narrow flowering glumes, which are still more strongly 

 nerved. The spikelets resemble those of P. nervosa, 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, iSg^, Rj'dl^erg- 

 2i^j (type, in herb. Columbia Univ.). 



