lxiV PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 
Plant Diseases. —Dr. William G. Smith reports as follows on 
the specimens submitted to him :— 
Pceonia Disease. —From a further specimen of this 
disease I have confirmed my previous opinion. The latest 
specimen sent bore the fructifications of a fungus which I 
hope to have identified. The diseased tissues contain 
abundant mycelium, and the starting point for attack was 
from last year’s old wood. I shall be glad to communicate 
further results later. 
Begonia Leaves .—From the material sent by Mr. Caddy 
it was difficult to say really what was the cause of disease. 
One or more fungi were easily developed on the wither¬ 
ing leaves, but whether these were saprophytic on the dying 
tissue or were the cause of the trouble, it is not safe to say. 
Begonias of this class are so liable to wither at the margins 
(from draughts, &c.), and are so unsuitable for transit to a 
distance, that accurate observation can only be made on 
plants in their actual habitat. 
Fungus on Thuya {Biota). —The plants sent were 
attacked by Pestalozzia funerea, Desm., a fungus well 
known to occur on dying Thuyas and allies. The life- 
history is, however, imperfect. 
Cytisus Adami .—Mr. Herbert E. Brooks sent specimens of 
the curious Cytisus Adami, a well-known “graft hybrid,” as it 
is supposed to be, for M. Adam budded C. purpureus on C. La¬ 
burnum in 1825. The purple and yellow flowers are of the 
true species, but the brick-red flowers are from the hybrid. It 
was described in the “ Gardeners’ Chronicle,” 1841, pp. 825, 836 ; 
1842, p. 397, and often subsequently. The fullest account is in 
Braun’s “Rejuvenescence,” 1851 (English translation, 1853); 
in Prof. Morren’s paper in the “ Belgique Horticole,” 1871 ; and 
a summary of the whole subject is given in Darwin’s “Varia¬ 
tion of Animals and Plants,” vol. i., ed. 2 (1875), p. 413. 
Scientific Committee, June 28. 
Dr. M. T. Masters, F.R.S., in the Chair. 
Pyrethrum Flowers Arrested. —Mr. E. Ballard sent some 
flowers, “ taken from healthy roots, full of bloom, but on which 
