142 



Fig. 111. TJniola latifolia Mx. BROAD-LEAFED SPIKE-GRASS.— a, A spike- 

 let; b, the 3 lower empty glumes; c, a flowering glume; rf, the palea. Figs. 265 

 and 266, in Bui. 7, and 530 and 531, in Bui. 17, illustrate other species of Uniola. 



111. UNIOLA Linn. Sp. PI. 71. 1753. Spikelets 3- to many-flowered; raehilla 

 articulated above the empty glumes and between the florets. Empty glumes at 

 the base of the spikelet 3 to 8, compressed-keeled, acute, unequal; flowering 

 glumes firm-membranaceous, compressed-keeled, acute, or acuminate-pointed, 

 striate, many-nerved. Palea rigid, 2-keeled. Stamens 1 to 3. Styles distinct; 

 stigmas plumose. Grain compressed, oblong, free. Erect perennials, with sim- 

 ple culms, broad and flat or narrow and involute leaves, and narrow and few- 

 flowered or ample, lax, and many-flowered panicles. 



Species 4 to 5, all North American. 



