Explanation of PI, XXIII. 



-UIHX formosana HAYATA. 



Fig. 1. A branch. 



2. A leaf. 



3. 4. Flowers. 



5. Corolla, expanded, showing stamens. 



6. Corolla lobes, seen from different sides. 



7. 8. Stamens, seen from different sides. 

 9. An ovary. 



10. Transverse section of tlie same. 



