Fig. 5.—Nuphar japonicum DC. 1, Habit; 2, young submersed leaf; 3, aerial leaf; 4, flower; 5, sepal with 2 petals inside; 6, petal; 7, 8, 9, 

 10, 11, 12, stamens; 13, anther; 14, pistil; 15, the same, cut longitudinally; 16, ovary, cut transversely; 17, ovule; 18, floral diagram; 19, 

 fruit. 



