PLATE XIX. 



A.— Polygonum Bistorta, lAnnceus : p. 115. 



1. A flower, separate. 



2. The pistil with its three styles. 



B, — Aristolochia Clematitis, Linnceus : p, 116. 



1. A flower complete. 



2. The pistil, showing the rayed stigma and epigynous sta- 



mens. 



3. A capsule. 



C. — Pinus sylvestris, Linnceus : p. 117. 



1. One of the pairs of leaves, with its sheath. 



2. One of the male catkins, with its bract. 



3. An anther, with its two adnate cells, and scale-like con- 



nective. 



4. One of the scales of the female catkin, with its two 



naked ovules. 



5. Inner view of 'a similar scale when mature, with its two 



winged seeds. 

 D. — Tamus communis, Linnceus : p. 118. 



1. One of the male flowers with stamens. 



2. One of the female flowers with inferior ovary and three- 



branched style. 



3. The style, separate. 



4. A ripe berry. 



