FESTUCE.E. 



621 



in number, flat, softly pubescent, 5-10 cm. long, 2-3 mm wide. 

 Panicle pyramidal, 7-12 cm. long, rays very slender, flexuose in 

 half- whorls of 4-G, the longest 4-5 cm. long besides the spikelet, 

 each bearing 1-4 pubescent spikelets. Spikelets slender, 5-6- 

 flowered, joint of rachilla 3 mm. long; emjaty glumes narrow, witli 

 slender, hyaline points, first 1-nerved, 6 mm. long, second 3-nerved, 

 8-10 mm. long; floral glume narrowly elliptical, 5-7-nerved, 10-12 

 mm. long including the hyaline teeth at the apex, awn 10-20 mm. 

 long; palea shorter. Grain concave, round on the back, 7-8 mm. 

 long. 



U. S. Dept. Agricul. 755; Vermont, Pringle; Massachusetts, 

 L. H. Bailey; New Jersey, Scrihier 3517 a, 



Introduced from Europe. 



20. B. Pumpellianus Scribn. Bull. Torr. Club, 15: 9 (1888). 



An erect stout perennial, 50-100 cm. high, with creeping 

 rootstocks. Slieaths 4-5, smooth, or sparingly pubescent; ligule 

 firm, 1.5 mm. long ; blades smooth 

 below, scabrous above, flat, with long 

 involute points, the blades 15-25 cm. 

 long, 4-8 mm. broad. Panicle usually 

 erect, linear, rather dense, 8-20 cm. 

 long, rays 2-5 at each joint, the 

 longest 5-10 cm. long, each bearing 

 1-3 spikelets. Spikelets linear-lanceo- 

 late, compressed, tinged with purple, 

 4-10-flowered, 2-4 cm. long, the 

 longest joint of rachilla pubescent, 3 

 mm. long; empty glumes smooth, first 

 linear-lanceolate, 1-nerved^ 5-9 mm. 

 long, second elliptical-lanceolate, 3- 

 nerved, 7-11 mm. long; floral glume 

 softly pubescent, oval-lanceolate, 7-9-nerved, the lateral nerves 

 obscure, 10-17 mm. long, including the entire acute apex, awn 2-3 

 mm. long ; palea linear, 13 mm. long, finely ciliate on the keels. 



Colorado, Vasey for U. S. Dept. Agricui. 746; Wyoming, 

 Buffum C 35. 



Fig. 116. — Bromus Pumpelli- 

 anus. A, spikelet ; a, floret. 

 (Scribner.) 



