EXPLANATION OF PLATE 29 



TricJiojpilia jamaicensis 



1. Plant, natural size. 



2. Column x about 3. 



3. Pollinia enlarged. 



Oncidium pulchellum 



4. I'lower, nat. size. 



5. Column x 6. 



6. Anther enlarged. 



7. Pollinia enlarged, from front. 



8. Do. from side. 



Oncidium luridum 



9. Flower, nat. size. 



10. Anther enlarged. 



11. Pollinia enlarged. 



Oncidium triquetrum 



12. Flower, slightly enlarged. 



13. Column X 4 or 5, from front. 



14. Do. from back. 



15. Anther enlarged. 



16. Pollinia enlarged, from front. 



17. Do. from back. 



Oncidium guttatum (0. teirajwtalum) 



18. Flower, nat. size. 



19. Flower, with one sepal and one petal removed, x 2h 



20. Anther enlarged. 



21. Pollinia enlarged. 



Oncidium sphacelalum (by error altissimum) 



22. Flower, nat. size. 



23. Anther enlarged. 



24. Pollinia enlarged, from front. 



25. Do. from side. 



I 



