Explanation of PL XI. 



Bulbopltyllwn uraiense HAY ATA. 



Fig. 1. The plant. 



2. Central portion of a flower. 



3. A. dorsal sepal. 



4. A. lateral sepal. 



5. A. petal. 



6. Column, mentum and lip. 



7. The same, seen from a different side. 



