tE^te i^fjobottenbron ^ocietp i^oteef. 
So far as is known, these have not yet flowered. 
By the courtesy of their respective writers, to whom the thanks of the 
Society are due, it has been possible to attach to this report three letters from 
Professor Bayley Balfour, two from Mr. P. D. Williams, and an extract from a 
letter of Mr. E. H. Wilson’s, all of which are of great interest. 
There is also included the results of a search of a number of books in which 
references to Rh. caucasicum, its varieties and its hybrids, are to be found. They 
could, no doubt, be added to. As far as they go, they do not disclose much 
information about the hybrids, which, as Mr. Bean points out (Vol. II., p. 349), 
are so numerous in gardens. 
G. W. E. LODER. 
January, 1917. J. C. WILLIAMS. 
3 
