Fig. 52: Najas flexilis: a, mature staminate flower, showing dehisced anther and 

 ruptured spathe, X 8; b, young sessile, staminate flower enveloped by spathe, X 8; c, 

 pistillate flowers in axil of leaf sheath, showing variations in stigmas, X 8; d, habit, 

 plant completely submersed, showing the fascicled leaves, X lVf>; e, mature seed, shiny 

 yet finely reticulate under magnification, X 12; f-h, leaf blades, showing minute teeth 

 and obliquely sloping somewhat unequally shouldered leaf sheaths, X 5. (From Mason, 

 Fig. 35). 



