598 POACE.E. 



blades 20-40 cm. long, obtuse or pungent, smooth, rather soft^ 

 5-angled, 7 bundles of sclerenchyma, 5.7 mm. diam., those of the 

 culm 2 in number, of same form as those below. Panicle thin, 

 open, 8-16 cm. long, rays in pairs or single, distant, the longest 

 5-7 cm. long, bearing a few spikelets on the upper one-third. 

 Spikelets linear-lanceolate, 10 mm. long, 5-flowered, second glume 

 ovate-lanceolate, 3.2 mm. long, 3-nerved; floral glume slender, 

 5-6 mm. long, the awn 3-G mm. long; palea about the length of' 

 its glume. Anthers 2-2.2 mm. long. 



Oregon, Howell & Henderson. 



Oregon and California. 



Var. Arizonica (Vasey) Hack. ined. F. arizonica Vasey, Cou- 

 trib. U. S. Xat. Herb.,1: 77 (1893). 



A rather stout scabrid, pale, glaucous grass, 50-60 cm. high;, 

 nodes 2 in number, the upper two-fifths of the way up the culm. 

 Blades of sterile shoots numerous, 30—40 cm. long, scabrous, con- 

 duplicate, in cross-section circular or oval with obtuse angles, scleren- 

 chyma in 5-7 rather broad bauds, about 0.5 mm. diam.; ligule 

 consisting of two equal ciliate teeth, 0.7 mm. long; blades of the 

 culm like tliose of the sterile shoots; ligule symmetrically biauri- 

 culate, 1.3 mm. long. Panicle simple, erect, 10-15 em. long, rays 

 single, erect, rather stout, scabrid, soon branching, the longest ray^ 

 4-7 cm. long, bearing a few spikelets. Spikelets linear or linear-lan- 

 ceolate, 7-9-flowered, 10-15 mm. long; empty glumes keeled above, 

 scabrid, first awl-shaped, 4-5 mm. long, second ovate-lanceolate, 5-6 

 mm. long, reaching two-thirds of the way to the apex of the floral 

 glume next above; floral glume 6-7 mm. long, elliptical-lanceolate, 

 obscurely nerved, slightly keeled below the apex, tlie tiwn 0.5-1 

 mm. long; palea linear, 5.5-8 mm. long, 2-toothed. Anthers 3.7 

 mm. long. Ovary obovate, apex pubescent under a lens. 



Colorado, Wolfe in 1873, labelled F. ovina var.; Arizona, Tracy. 



The plant from Flagstaff, Arizona, collected by Tracy, is the 

 same as one above named by Hackel, and comes under F. ovina as 

 defined by him. 



Var. ingrata Hack, in herb. 



Culms 40-60 cm. high. Leaves of sterile shoots scabrous, 18-20- 



