44 



Fig. 29. Hydrochloa fluitans (Mx.) Torr.— a, A branch showing the inflores- 

 cence; b, a staminate spikelet; c, a pistillate spikelet; d and e, grain. 



'29. HYDROCHLOA Beauv. Agrost. 135. 1812. Spikelets unisexual, monce- 

 cious, the staminate terminal, the pistillate axilliary. Glumes 2, somewhat 

 unequal, membranaceous, concave, awnless; palea none. Stamens 6. Styles 

 short, distinct; stigmas elongated, plumose. Grain included within the glumes, 

 free. A slender branching, floating or creeping, aquatic grass, with narrow 

 floating leaves and few spikelets in terminal and axillary spikes. 



Species 1. Southern United States. 



