Explanation of PI, IV. 

 PerrotteUa arisanensls HAY ATA. 



Fig. 1. A branch. 



2. A leaf. 



3. A bract. 



4. A flower-bud. 



5. A male flower, x 10. 



6. Stamens, seen from different sides. 



7. Rudimentary ovary. 



8. A female flower, x 15. 



9. 10. Staminodes, seen from different sides. 



11. Ovary. 



12. A fruit, x8. 



13. A seed, seen from side. 



14. The same, seen from top. 



