PLATE XVII. 



A. — Digitalis purpurea, Linnmus : p. 111. 



1. The didynamous stamens, separated from the corolla. 



2. The pistil. 



3. A transverse section of the ovary. 

 B, — Orobanehe minor, Sutton . p. 112. 



1. A flower separated from the spike, with its bract. 



2. The corolla laid open, showing the attachment of the 



stamens. 



3. One of the sepals. 



4. The pistil with a bract and sepals, the corolla removed. 

 C. — Verbena officinalis, Linmeus : p. 114. 



1. A flower, separate. 



2. The corolla laid open, showing the attachment of the 



stamens, and surrounding the pistil. 

 D. — Salvia pratensis, LinncBus : p. 113. 



1. A flower, separate. 



2. The stamens, showing the short filament, with the elon- 



gated connective bearing a perfect anther on its long 

 arm and an abortive one on its short arm. 



3. Another view of the lower part of the connective. 



4. The pistil, showing the four-lobed ovary. 



