EXPLANATION OF PLATE 19' 



SchomhurgJcia Lyonsii 



1. Portion of raceme, natural size. 



2. Column x 2, back view. 



3. Do. front view. 



4. Anther enlarged, front view. 



5. Do. back view. 



6. Pollinia, as attached to stigma, enlarged. 



Brassavola cordata 



7. Flower, nat. size. 



8. Column X 3. 



9. Anther, with pollinia, enlarged. 



10. Empty anther case enlarged. 



11. Pollinia enlarged. 



