106 
a 
Fie.80, Bouteloua oligostachya se Aine BLUE GRAMA.—a, The empty 
glumes of a spikelet; ba spikelet with the empty glumes removed, showing the 
flowe fy eyes and the pedicellate 3-awned ru ae. 
Fine s. 194 to to 207, in 7, an d 500 0 503, in Bul. 17, illustrate other T species of this 
genus 
80. BOUTELOU. Lag. Varied. Cienc. Litt, Art, 24: 141. 1805, Spikelets 1-to 
2-flowered, numerous (rarely 2 or 3 or only 1), crowded and closely sessile in 2 
rows along one side of a continuous flattened rachis, which usually projects 
pare 
beyond the spikelets: rachilla a he empty glumes, the con- 
tion bey ermaphrodite lower floret lly bearing \di- 
mentary glumes and 3 awns (rarely a ate flower). Empty glumes 2, 
unequal, the lower smalier, b keeled, flowering glume broader, 3-n, renga sa 
toothed, or cleft, 3 of t yi Palea 
Haat and 2-toothed. Grain inclosed within th e glume, but f cay Usually 
wW annuals or perennials, with narrow rand flat or convolute leaves, the uni- 
rial spikes few or many 
axis, 
Pe ES EER a 
