I40 LOBELIA FEAYANA.—DR. FEAY'S LOBELIA. 
on one side, and in many other points, perhaps, resembling a 
Lobelia. In fact different degrees of cohesion of parts which 
necessitate growth in accordance, or degrees of intensity or 
of direction in the growth waves,—apparently slight causes— 
account for the actual differences which divide some of the great 
families of plants from one another. 
The manner in which the pollen reaches the stigma and thus 
fertilizes the flower has given rise to a great deal of speculation. 
It is only after the pistil has pushed itself through the mass of 
pollen that the stigmatic surface at the apex becomes exposed. 
It seems very difficult for it to receive any of its own pollen on 
this account, and the only way in which it can be fertilized is by 
receiving pollen from other flowers by the aid of insects. This 
view is held by Darwin and others. But it is certain that Lodelia 
erinus will produce seeds freely when insects fitted for the work 
of bringing pollen from a distance are wholly excluded, and it is 
well worth studying how the pollen, necessary for fertilization, is 
carried to the stigmatic surface. The species now illustrated, 
L. Feayana, is so nearly related to the species employed by Mr. 
Darwin in his experiments, that it has suggested this reference 
to Mr. Darwin's views. 
EXPLANATIONS OF THE PLATE,—1I. A small plant, full size. 2. Enlarged flower, showing the 
form of the three-cleft lip. 3. Pistil, showing its curved form and circle of hairs beneath 
the bilobed pistil. 4. Longitudinal section, showing the pistil surrounded above by the 
united anthers before it has pushed its way through them, 
