118 



Fig. 87. CotteapappophoroidesKth. COTTA-GRASS.—o. The empty glumes 

 of a spikelet; b, a floret seen from the side; c, dorsal view of a flowering glume; 

 d, palea; e, caryopsis. 



87. COTTEA Kunth, Rev. Gram. 1: 84. 1835. Spikelets many, 2- to 6-flow- 

 ered ; rachilla articulated above the empty glumes; flowers hermaphrodite, or 

 the uppermost staminate, usually imperfect. Outer glumes empty, persistent, 

 membranaceous, acute or tridentate, 7- to 9-nerved; flowering glumes 9- to 

 11-nerved, and irregularly 9- to 11-lobed, the divisions erect and for the most 

 part awn-like. Palea rather broad, 2-keeled, somewhat exceeding the undi- 

 vided portion of the glumes. An erect, branching grass, with linear flat 

 leaves, and oblong, open panicles. 



Species 1, Texas to Arizona and southward. 



