Explanation of PL I. 



Nuphar Shimadai HAYATA. 



Fig. 1. The plant, 



2. A flower. 



3. The same, sepals partly taken off. 



4. A sepal. 



5. A petal. 



(>, 7, 8. stamens, seen from different sides. 

 9. Ovary. 



10. A seed. 



11. The same in section. 



