Explanation of PI. XII. 



Cissus pterodada HAYATA. 



Fig. 1. The plant. 



2. Cross section of the stem. 



3. Part of inflorescence. 



4. A flower, two petals are taken off to show the stamens and 



pistil. 



5. Petals. 



6. 7. 8. Stamens, seen from different sides. 



9. An ovary. 



10. Vertical section of the same. 



11. Cross section of the same. 



