540 POACE^. 



or acumiuate, 4-10 cm. long, about 4 mm. wide. Panicle slender,, 

 open, oval, or long-pyramidal, 10-15 cm. long, rays mostly in pairs, 

 slender, fiexnose or nodding in fruit, the lower ones often distant, 

 the longest 5-9 cm. long, bearing a few spikelets, for 1.5-2 cm. at 

 the end. Spikelets broadly oval, 2-3-flowered, 3-4 mm. long, joint 

 of rachilla 0.4-0.6 mm. long; first empty glume 2-2.5 mm. long, 

 1-nerved, ovate-lanceolate or obtuse, second 2.5-3 mm. long, 3- 

 nerved, oval-lanceolate; floral glume 2.4-4 mm. long, membran- 

 ous to very near the tip, broadly oval, slightly webbed at base, mi- 

 nutely scabrid on the keel; palea oval, 2-2.5 mm. long, minutely 

 scabrid on the heavy keels. 



New Hampshire, Faxon 18, 26; Vermont, Pringle; Pennsyl- 

 vania, F. E. Fernoiv; Michigan, Cooley, Dr. Clark 711, 715, 713, 

 Beal 125, ]Yheeler 126. 



Woodlands and hillsides. 



Lower Canada, to New York and Wisconsin. 



19. P. Kelloggii Vasey, 111. N. A. Gr. 2: 79 (1893). 



Erect slender, 40-60 cm. high, smooth throughout except the 

 nerves of floral glumes and palea. Ligule 2-3 mm. long; blades of 

 the culm 2 in number, flat, acute, 2-7 cm. long, 2-2.5 mm. wide. 

 Panicle thin, pyramidal, 7-10 cm. long, rays mostly in pairs^ 

 capillary, rather distinct, often curved or reflexed, the longest 4.5 

 cm. long, bearing a few spikelets on the outer third. Spikelets. 

 purplish, oval or linear-lanceolate, 5-7 cm. long, 2-4-flowered, joint 

 of rachilla 0.7 cm. long; empty glumes acute, first lanceolate, 1- 

 nerved, 2.3 mm. long, second oval-lanceolate, 3.3-4 mm. long, 3- 

 nerved; floral glume 3.5-4.5 mm. long, tinged with brown as well 

 as purple, sparingly webbed at the base, and slightly imbesceut on 

 the lower part of three nerves, narrowly oval, acute, subacute or 

 obtuse, 5-nerved, the intermediate nerve on each side obtuse, all the 

 lateral nerves extending about two-tliirds the length of the glume; 

 palea linear, 3 mm. long. 



Montana, Tweedy 638 ; Alaska, Harrington; British Columbia,. 

 M. Kay; Oregon, Cusich 977; California, Bolander 4705. 



Colorado to Alaska and California. 



20. P. Bolanderi Vasey, Coult. Bot. Gaz. 8:32 (1882). 



