THE LOBELIA FAMILY. 



381 



Syfihocampylus Humboldtianus. a, Stigma with its two divisions firmly closed; b, 

 Stigma with, its two divisions open or expanded that is, in a recepti-ve state ; c, Syn- 

 genesious anther-case, showing how the pollen is ejected on tfte apex being irritated; d, 

 Old and partly withered JJower, showing recepti-ve stigma after it has emerged from 

 the syngenesions anther-case; e, Anther-case and style, twice natural size; f, Pollen- 

 grains magnified. 



