PAMCE.K. 107 



c. Spiki'lets '.] in number. 5-0 mm. lonjr. very 



narrow (some plants of 30) 31, 32 



c. Spikclets about 5 mm. long, ovoid or ovul, 



acute 33 



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



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



d. Panicle diffuse, large (e) 



e. Slieatlis pubescent 35 



e. Sheaths smooth 36 



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



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

 f. Panicle very narrow, simple, culm and leaves 



slender 38 



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



f. Panicle diffuse (g) 



g. Si)ikelets less than 2 mm. long, plant 



slender 40 



g. Si)ikelets about •i.5 mm. long. . . . (h) 



h. IJootstocks creeping 41 



h. Ikootstocks not creoping. . . 4'^. 43, 44 

 g. Spikelets acute on very slender pedicels of 



a large diffuse panicle (i) 



i. Annual : sheatlis usually hirsute, sjjikc- 



lets *^-2.T mm. long 45 



i. Annual; slu'aths usually hirsute, spike- 

 lets 3.'-i-3.5 mm. long 46 



i. Sheaths usually smooth, spikilets 3.5- 



6 mm. long 34 



i. Sheaths usually smooth, spikelets 4 



mm. long 36 



g. Perennial : smooth, bulbous. s))ikelets 



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 



