EXPLANATION OF PLATE 17 



Hormidium tripterum 



1. Portion of plant, natural size. 



2. Flower x 3. 



3. Column and lip, anther removed X about 7 



4. Anther enlarged, side view. 



5. Do. front view. 



Lselia monophylla 



6. Stem with roots and leaf, nat. size. 



7. Flower, nat. size. 



8. Lip and column x 4. 



9. Lip spread open X 4. 



10. Anther enlarged from back. 



11. Do. from front. 



12. Pollinia enlarged. 



Octadesmia montana 



13. Portion of stem, nat. size. 



14. Column enlarged front view. 



15. Do. back view. 



16. Pollinia enlarged. 



