FKS'ITCE.E. 639 



Subalpinc bogs. 



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

 U. S. Nat. Herb. 1 : -.'ri (1893). P. Sanilherfjii Vasey, 1. c. 270. 



A slender tufted erect perennial, 40-GO cm. higb. Leaves of 

 sterile slioots, lO-^i') cm. long, the blades involute, filiform; leaves 

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

 cm. long. Panicle simple, subsecund, G-8cm. long, raysflexuose, in 

 twos and threes, the sets ratlier 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-nervcd, 2-3 mm. long, second S-nervod, 

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

 rather thin, oval when spread, 4-5 mm. long, 5-nerved; puleu nearly 

 as long, ciliohite on the keels. Nearly allied to P. occiilcnfaJis. 



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

 a new one. 



Jvocky slopes, Idaho, Sandherg 138, 104, for U. S. Dcpt. Agricul. 

 in 1S!»2. 



IT. P. occidentalis A^asey & Scribn., ('ontrib. V . S. Nat. Herb. 

 1:274 (18'i3). P. trivialis occidenfalis Xn^eVyDv^c. Cat. (ir. 85 

 (1885). 



Culms and leaves more or less scabrous; culms (!0-80 cm. liigh, 

 sliglitly compressed. Ligule ovate, 2.5-3 mm. long; leaves of (!ulm 

 5-0 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 iialf of the keel. ov;:l-acute; palea 3.5 mm. long, otherwise 

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



Oregon (Swave's Island), HoirvU in 1880. 



18. P. debilis Torr. Fl. N. Y. 2:450 (1843). Weak Spear- 



GKASS. 



A soft smooth weak light-green tufted perennial, 60-80 cm. 

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

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



