EXPLANATION OF PLATE 2 



Hahenaria Purdiei 



1. Flower x 2. 



2. Lateral sepal X '^. 



3. Petal X 3. 



Hahenaria socialis 



4. Flower x 2. 



5. Lateral sepal X 4. 



6. Petals X 4. 



7. Lip X 4. 



Hahenaria troyana 



8. Flower x 2. 



9. Lateral sepal X about 5. ^ 



10. Petal X 4. 



11. Another form of petal X 4. 



12. Lip X 4. 



Pogonia gentianoides 



13. Plant, natural size (from Swartz's type). 



14. Flower X 2. 



15. Lip X 4. 



Vanilla inodora 



16. Lip and column X J. 



Vanilla Wriglitii 



17. Flower, with one sepal and one petal removed, X J. 



Vanilla claviculata (by error parasitica) 



18. Lip and column X h. 



19. Column showing attachment of portion of lip X i 



Vanilla pliaeantlia 



20. Lip (cut open) and column x i. 



Pelexia setacea 



21. Flower, nat. size. 



22. Flower, with two sepals and one petal removed, nat. size. 



