Fig. 46: Zannichellia palustris: a, branch with submersed filiform 1 -nerved leaves, 

 showing stipular sheaths and flowers in lower axil, the staminate flower comprised of a 

 single stamen arising at the base of the short stout peduncle which bears 4 (usually 

 2 to 5) pistils arrounded by a spathe, X 4; b, fruit (longitudinal section), X 8; c, in- 

 volucre or spathe with 2 young pistillate flowers and a single staminate flower, all from 

 the same axil, X 16; d, habit, showing the long opposite filiform submersed leaves and 

 maturing fruits in the axils, X %; e, fruit, showing toothed ridges as revealed by normal 

 deterioration of outer coat in old fruits, X 8; f and g, mature undried fruits before 

 deterioration of coat, X 8. (From Mason, Fig. 37). 



