Explanation of Pl. XXV. 



HcmipUki formosana Hayata. 



Pig. 1. The plaut. 



2. A flower. 



3. Tbe same, seeu from face. 



4. A doi-sal sepal. 



5. A lateral sepal. 



6. A petal. 



7. A Hp. 



S. A column and lip, seeu from side. 



9. Apical poiiion of a colmuu. 



10. Tlie same, seen fi-om side. 



11. Tlie same, in section. 



12. The same, seen from back. 



13. 14. PoUinariimi, seen from differeut sides. 



