i&totiotientiton ^octetp ^oted 
Effect of 
hybridisation in 
producing tricotylar 
seedlings. 
other writers, but each writer has dealt with his own class of plants, and each 
class has probably its own peculiarities, so that it is dangerous to generahze too 
much from particular instances. 
With regard to Rhododendrons, almost a volume might be written on the 
various influences of various pollens. Mr. Anderson-Henry is quite right in 
saying that some pollen seems to burn or poison the stigma to which it is apphed ; 
other pollen burns as it goes, and yet fertilizes. Some works slowly and yet more 
effectually than the speedy worker, and some seems to require frequent 
application to the stigma to produce any result. Perhaps the most curious 
observation I have made is the tendency of the pollen of one Rhododendron on 
another Rhododendron to produce seedlings vdth three instead of the normal 
number of cotyledons. 
But I have trespassed long enough on your space for the present with my 
special subject. 
J. H. M. 
66 
