EXPLANATION OF PLATE 21 



Bletia purpurea (B. alta) 



1. Top of raceme, natural size. 



2. Flower spread out x 2. 



3. Lip and column of bud, nat. size. 



4. Lip and column of opening flower x 2. 



5. Lip flattened out x 2. 



6. Anther enlarged. 



7. Pollinia enlarged. 



Bletia florida 



8. Flower, with one sepal and one half and petal removed, 



nat. size. 



9. Lip and column of bud, nat. size. 



10. Lip x nearly 2. 



11. Column x 2. 



Figs. 3, 9, 10, 11 are copies of Salisbury's original drawings 

 in the Department of Botany. 



