562 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Figure 813. — A, Zizania aquatica var. interior. Plant, X Vx\ pistillate spikelet, X 2; second view, X 5. (Fink, 

 Iowa.) B, Z. aquatica. Pistillate spikelet, X 5. (Hitchcock, Va.) 



