44 PLANTS BAKERIAN.E. 



POA ANNUA, Linn. Sp. 68. Observed only in a field near 

 Hamor's Lake, n. 940. 



POA LAXA, Hsenke in Jirasek, Beob. 118. Summit of Mt. 

 Hayden, 13,000 feet, n. 938. 



POA ALPINA, Linn. Sp. 67. Rare below 9,000 feet, com- 

 mon at higher elevations, very strong and luxuriant near 

 Little Kate Mine, 11,000 feet, but becoming much dwarfed 

 above 12,000 feet, nn. 925, 928, 929. 



POA CENISIA, All. Auct. 40. Only at summit of the 

 divide above Cumberland Mine, 12,000 feet, n. 933. 



POA PRATENSIS, Linn. Sp. 67. Abundant below 9,000 

 feet, and variable. A form from the La Plata Canon, near 

 the upper limit of the species, has a very close panicle, with 

 glaucous glumes; while another, from dry gravelly soil about 

 Parrott City, has the panicle short and still more slender, 

 and the glumes dark -purple, nn, 930, 932. 



POA NEMORALIS, Linn. Sp. 69. Occasional on dry banks, 

 9,000-11,000 feet, n. 935. 



POA ARIDA, Vasey, U. S. Herb. i. 270. Occasional at 

 Mancos, 7,000 feet, and in La Plata Canon, 9,500 feet, n. 327. 



POA BUCKLEYANA, Nash, Bull. Torr. Club, xxii. 465. 

 On dry hills, 7,000-9,500 feet; rather rare, n. 110. 



POA LONGIPEDUNCULATA, Scribn. Bull. Agrost. xi. 54. 

 A characteristic, species of the region of the West Mancos 

 and its tributaries at from 9,000 to 10,000 feet altitude; not 

 seen above 11,000 feet, or on the easterly slope of the 

 mountains, nn. 138, 160, 194, 326. 



POA LUCIDA, Vasey, U. S. Herb. 274. Common about 

 Mancos in dry soil ; also a peculiar form, with very hairy 



