Explanation of Pl. IV. 



Perrottetia arisancnsis Hayata. 



Fig. 1. A braiich. 



2. A lecaf. 



?,. A bract. 



4. A flower-hud. 



5. A male flower, x 10. 



G. Stamens, seea from different sides. 



7. Rudimcntary ovary. 



8. A female flower, x 1.5. 



!t, 10. Staminodes, seeu from difterent .sides. 



11. Ovary. 



12. A fruit, x8. 



13. A seed, seen from side. 



14. The same, seen from toj). 



