PLATE XYI. 



A. Villarsia nymphseoides, Ventenat : p. 104. 



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



tachment of the stamens. 



2. The pistil. 



B. Polemonium cceruleum, 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, Linnaus : 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. 



