Mr. W. J. Bean, in a letter to Mr. Eley dated 20th July, 1917, writes — 
" In the most interesting and valuable article on R. caucasicum 
and its hybrids, I am afraid that I am made to appear as having 
considered R. caucasicum and R. chrysanthum to be varieties of 
one species. The fault no doubt is mine in not having made it 
sufficiently clear in my book at the place cited, but, as a matter of 
fact, I have never regarded them as other than perfectly distinct 
species.” See page 4, §3. 
The above note constitutes the only material difference between the so-called 
1st and 2nd editions of Vol. I., Part I. of the Society’s Notes.—C. C. E. 
