Harebells 207 
of the same type of structure, with a loss of symmetry. 
The probability is that the Lobelia flower is derived 
from a Campanulate form, but the two upper corolla- 
lobes have become reduced in size and more or less 
curved back, whilst the lower three form a broad 
alighting platform for insects. The corolla-tube is 
split along the upper side to enable insects to get at 
the honey-glands, the anthers being united into a 
tube, though their filaments remain separate. The 
pollen is discharged into this tube much as in the 
Dandelion, and swept out by a ring of hairs near the 
end of the pistil, which afterwards emerges from the 
anther-tube and divides into two short stigma-lobes. 
All the members of the Bellwort family on being 
snapped across exhibit a milky juice of an acrid, and 
in some species poisonous, nature. This fact accounts 
for the other: that be the turf of the heath cropped 
ever so closely by sheep or rabbits, the Harebell will 
be left untouched. 
