174 



PANICACE^. 



glume with a rough awn 2 mm. long. Outer glume of the stami- 

 nate flowers 5-nerved, inner 3-nerved. Styles stout, united for one- 



FlG. d4:.—Zizaniaaguatica. A, staminate spikelet; B, pistillate spikelet; b, 

 pistil. (Richardsou.) 



third of their length, diverging. Grain slender, dark brown, linear, 

 10-15 mm. long. Seed adherent to the thin pericarp. 



