PANICE.E. 107 



c. Spikelets 3 in number, 5-6 mm. long, very 

 narrow (some plants of 30) 31, 32 



c. Spikelets about 5 mm. long, ovoid or oval, 



acute 33 



c. Spikelets 3 in number, 5-6 mm. long, wider . (d) 



d. Panicle narrow, simple, blades smooth. . . 34 



d. Panicle diffuse, large (e) 



e. Sheaths pubescent 35 



e. Slieaths smooth 36 



c. Spikelets about 8 mm. long, ovate-lanceolate. . 37 



c. Spikelets usually 4 mm. long or less. . . . (f) 

 f. Panicle very narrow, simple, culm and leaves 



slender 3g 



f. Panicle spikelike, many-flowered. ... 39 



f. Panicle diffuse (g\ 



g. Spikelets less than 2 mm. long, plant 



slender 40 



g. Spikelets about 3.5 mm. long. . . . (h) 



h. Tvootstocks creeping 41 



h. Kootstoeks not creeping. . .42. 43, 44 

 g. Spikelets acute on very slender pedicels of 



a large diffuse panicle (i) 



i. Annual; sheaths usually hirsute, spike- 

 lets 2-2.7 mm. long 45 



i. Annual ; sheaths usually hirsute, spike- 

 lets 3.2-3.5 mm. long 46 



i. Sheaths usually smooth, spikelets 3.5- 



6 mm. long. 34 



i. Sheaths usually smooth, spikelets 4 



mm. long 36 



g. Perennial ; smooth, bulbous, spikelets 



terete, 3-4 mm. long 47 



g. Perennial ; scaly rhizomes, spikelets 4 



mm. long 48 



g. Perennial ; tufted, spikelets 3.5-4 mm. 



long, blades 3-4 mm. wide 49 



