XVI EXPLANATION OF THE PLATES. 



2. The column and cells of the single perfect anther. 



3. One, of the pollen-masses. 



D. — Cypripedium Calceolus, Linnesus : p. 19. 



1. Front view of the column, with its abortive central 



stamen, and two lateral perfect ones. 



2. Back view of the same. 



PLATE VI. 



A. — Crocus vernus, WiUdenoio : p. 4. 



1. The base of the flower-tube, laid open in the upper part, 



showing the attachment of the stamens. 



2. One of the stamens. 



3. The three-cleft stigma. 



B. — Galanthus nivalis, Linnceus : p. 3. 



1. A stamen. 



2. The pistil, showing the ovary at the base. 

 C. — Seilla verna, Hudson : p. 20. 



1. One of the flowers, separate. 



2. A segment of the star-shaped perianth, with its stamen. 



3. The pistil. 



J). — Hyacinthus non-scriptus, Linnceus : p. 20. 



1. Portion of a flower, showing the pistil, and the insertion 



of the stamens. 



2. A transverse section of the ovarv. 



PLATE YII. 



A. — Berberis vulgaris, Linnaeus : p. 80. 



1. A flower, separate. 



2. A petal, with its two glands. 



3. A stamen, showing the valves of its anthers. 



4. The pistil. 



5. One of the fruits. 



