630 PHARMACEUTICAL BOTANY 
depending upon the species. Frequently they are long funnel- 
shaped, tubular or vase-shaped. The color of every species 
varies with its age as well as extent to which it is exposed to 
Fic. 475.—Sarracenia purpurea, a pitcher plant from a northern bog. (From Jenkins’ 
“Interesting Neighbors.) 
bright sunshine. In some respects the form of pitchers resembles 7 
Heliamphora, but there is only a single wing present and further, 
the lid is considerably larger. * : | - 
In all we find the pitchers showing an alluring outer surface : 
covered with nectar glands, but devoid of the upwardly directed 
