XX11 EXPLANATION OF THE PLATES. 



B. Polemonium cc&ruleum, Linnceus : p. 105. 



1. A portion of the throat of the corolla, showing the in- 



sertion of the stamens. 



2. The pistil, surrounded by an annular disk. 



3. A capsule. 



C. Convolvulus arvensis, Linnceus : p. 106. 



1. One of the stamens. 



2. The pistil, surrounded by an annular disk. 

 D. Solanum Dulcamara, Linnceus : p. 109. 



1. A flower, showing the connivcnt anthers. 



2. One of the anthers separate, showing the terminal pores. 



3. The pistil. 



PLATE XVII. 



A. Digitalis purpurea, Linnaeus : p. 111. 



1. The didynamous stamens, separated from the corolla. 



2. The pistil. 



3. A transverse section of the ovary. 

 B. Orobanche 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 ofncinalis, Linnceus : p. 114. 



1. A flower, separate. 



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



stamens, and surrounding the pistil. 

 j) t Salvia pratensis, Linnceus : 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. 



