EXPLANATION OF PLATE 4 



Pseudocentrum minus 



1. Plant, half natural size. 



2. Flower, about nat. size, from sioV 



3. Do. from back. 



4. Do. from front. 



5. Flower x about 3. 



6. Section of flower x between 2 and 3. 



7. Column enlarged. 



8. Column from side enlarged. 



9. Anther enlarged. 



10. Anther, with pollinia, enlarged. 



11. Pollinia enlarged. 



