PLATE XX. 



A. — Paris quadrifolia, Linnceus : p. 119. 



1. One of the awl- shaped stamens. 



2. The pistil. 



3. A ripe berry, with the persistent perianth. 

 B. — Hydrocharis Morsus-ranae, Linncdus : p. 119. 



1. The stamens removed from the flower. 



2. One of the stamens, separate. 



3. The pistils, with six two-cleft stigmas. 

 C. — Ophrys apifera, Hudson : p. 126. 



1. Front view of the lip. 



2. Side view of the lip. 



3. The column, showing the anther-case and pollen-masses. 



4. One of the pollen-masses separate. 

 D. — Iris Pseud- acorus, Linnceus : p. 125. 



1. A stamen. 

 E. — Convallaria majalis, Linnceus : p. 127. 



1. A flower with its pedicel and bract. 



2. Vertical section of a flower, showing three of the sta- 



mens and the pistil. 



3. A ripe berry. 



