FESTrCE.E. 585 



m. Leaves of culm 4-5 17 



e. Ligule 1-2 mm. long, biauriculate, blades of the culm 

 1-2 cm. loug, rigid, curved, setaceous. Ovary obo- 



vate, glabrous 18 



e. Ligule minutely biauriculate, blade conduplicate, sub- 

 setaceous, in transverse section obtusely six-angled. . 19 

 e. Ligule symmetrically biauriculate, blade involute or 



conduplicate (n) 



n. Apex of ovary pubescent 20, 21 



n. Apex of ovary glabrous (k) 



k. Eays single 22 



k. Rays in twos, threes, or fours 23, 34 



e. Ligule of culm-leaves inequilaterally biauriculate. . (o) 



o. Blades filiform, involute 25 



o. Blades usually flat, rarely conduplicate, 2 mm. diam. 2(3 

 e. Ligule of culm-leaves auriculate on one side, blades 



often of two forms, 27 



1. F. microstachys (^lonro) Xutt. Journ. Acad. Phila. X. 8. 1 : 

 187 (1847). YuJjiia tnicrostachya Munro, Ik^nth. I'l. Ilartw. 342 

 <1839-o7). 



Culms slender, erect, 10-40 cm. high. Sheaths shorter tlian the 

 internodes, sinooth or pubescent; ligule 0.5 mm. or less in length; 

 blades 2-4, erect, slender, 3-8 cm. long. Panicle erect, racemose 

 or spicate, 3-9 cm. loug, rays stilf, channelled, single or some of the 

 lowest in pairs, erect, spreading or deflexed, the longest 1-3 cm. 

 long bearing 1-8 spikelets. Spikelets 1-5-flowered on clavate pedi- 

 cels, joint of rachilla over 1 mm. long; empty glumes involute, first 

 3-5 mm. long, second 5-S mm, long; floral glume convex, in- 

 volute, acuminate, scabrous, 4-7 mm. long, besides the awn, which 

 is 6-10 mm. long; palea scabrous, bearing two short awns. Stamen 

 1. Very variable. 



Oregon, IloweU; California, Jones, Orcntt. 

 Arizona to British America. 



A^'ar. ciliata A. Gray. Axis, rays of panicle, glumes and floral 

 glume strongly ciliate. 



Oregon, Howell; also found in California. 



