b 
Fic. 39. Aristida oligantha Mx. PRAIRIE TRIPLE-AWN.—<, The outer or 
empty glumes of a spikelet, 6, a floret, showing the three widely-spreading 
awns. 85 to 88,in Bul. 7, and 413 to 422,in Bul. 17, illustrate other species 
of this genus. 
39. . Sp. Pl. 82. 1753. Spikelets 1-flowered on long or short, 
slender pedicels, in terminal more or less expanded panicles; rachilla articu- 
the floral glume, bu 
seve ee eee 
below t not extending beyond it Glumes 3; the first two | 
empty .7 / ok p aro slightly keeled; the 3d or 
t closely rolled around 
+ 3 
