FESTUCE^. 539 



Subalpine bogs. 



16. P. Idahoensis, new name. P. fiUfolia Vasey, Contrib. 

 U. S. Nat. Herb. 1: 271 (1893). P. Sandhergii Vasey, 1. c. 276. 



A slender tufted erect perennial, 40-60 cm. high. Leaves of 

 sterile shoots, 10-25 cm. long, the blades involute, filiform; leaves 

 of the culms 2-3 in number, upper ligule 2-3 mm. long; blades 3-5 

 cm. long. Panicle simple, subsecund, 6-8 cm. long, rays flexuose, in 

 twos and threes, the sets rather close, longest ray 3-4 cm. long, bear- 

 ing 1-3 spikelets. Spikelets smooth throughout or scabrid, oval to 

 linear, pale green, 2-5-flowered, 7-10 mm. long, first empty glume 

 ovate-lanceolate, first 1-nerved, 2-3 mm. long, second 3-nerved, 

 ovate-lanceolate, 3-4 mm. long; floral glume much compressed, 

 rather thin, oval wlien spread, 4-5 mm. long, 5-nerved; palea nearly 

 as long, ciliolate on the keels. Nearly allied to P. occidentalis. 



The name filifolia had been previously used, hence the need of 

 a new one. 



Rocky slopes, Idaho, Sandberg 138, 164, forlJ. S. Dept. Agricul. 

 in 1892. 



17. P. occidentalis Vasey & Scribu., Contrib. F. S. Nat. Herb. 

 1:274 (1803). P. triviaUs occidentalis \me\,T)Q?>c. Cat. Or. 85 

 (1885). 



Culms and leaves more or less scabrous ; culms 60-80 em. high, 

 slightly compressed. Ligule ovate, 2.5-3 mm. long; leaves of culm 

 5-6 in number, blades 10-15 cm. long, 3-4 mm. wide. Panicle 

 10-15 cm. long, spikelets oval or ovate-lanceolate, 7 nun. long, 

 first empty glume lanceolate, 1-nerved, 3 mm. long, second ovate- 

 lanceolate, 4 mm. long; floral glume oblong-lanceolate, 4.2-4.7 

 mm. long, very thinly pubescent on the marginal nerves and tlie 

 lower half of the keel, ovd-acute; palea 3.5 mm. long, otherwise 

 like P. fiexuom, to which it is nearly allied. 



Oregon (Swave's Island), Howell in 1886. 



18. P. debilis Torr. Fl. N. Y. 2 : 459 (1843). Weak Spear- 



-GRASS. 



A soft smooth weak light-green tufted perennial, 50-80 cm. 

 high ; culms terete. Blades of sterile shoots flat or couduplicate, 

 5-8 cm. long, leaves of the culm 4, ligule 2.5-4 long; blades acute 



