89 
rendered highly susceptible to the attacks of other parasitic fungi, 
more especially of Nectria cinnabarina, which soon covers the 
branches with its seca coral-red, wart-like clusters of fruit. 
Youn ng trees soon succ mb to the combined attack of these fungi, 
and it is not at all wanna to see branches of large trees killed by 
e same mea 
The fungus first causes yellowish blotches ~ a on the 
leaves in June or July; these spots soo n change to brown and 
then black, increase in thickness, and the upper seitube becomes 
corrugated or wrinkled. During the autumn the surface of the 
blotches becomes covered with “myriads of very minute bodies 
called spermatia ; their Fanetion is not known, and they have not 
been observed to germinate 
uring winter, after the leaves have fallen, ss is produced 
in speci ial portions of the black patches, and the eedle-shape d 
spores en ek in the following spring, when they are carried by 
wind, T that happen to alight on damp young sycamore 
jane germinate, enter the tissues, and give origin to the black 
patches 
Protective measuves.—Remembering that the disease depends on 
he presence of spores.formed on dead and fallen leaves in the 
here this has been done thoroughly the disease has 
escap 
ceased to exist. 
Fig. 3, A sycamore leaf showing Rhytisma blotches ; nat. size. 
G. MASSEE. 
II—GUTTA PERCHA FROM A CHINESE TREE. 
(Eucommia ulmoides, Oliv.) 
Between 1887 ons 1890, from several localities on the middle 
aii aE river, Dr. A. Henry sent to Kew fruiting speci- 
mens of a ae. Chinese pas with 2% statement gene its 
bark is a most valued medicine in China, where it is 
4 To-chupe:, and that the tree is Hacvates gFe it. “I have ae 
seen it wild,” he adds, “ but I was informed it occurs so in Fang and 
athe Rapivia to the sate ” Fang is the name of a region near 
the middle part of the Yangtze-Kiang in the provi ince of Hupeh. 
This plant Prof. D. fie described (Hooker's Icones Plantarum, 
t. aide = Eucominia ulmoides 
Flowers not being available: and what material he had so 
liar that vite relationships were not obvious, Prof. Oliver left the 
argh eo of the order of Hucommia open, merely adding that 
the tribe P a ais of Euphorbiacez occurred to him as of 
probable affinity. 
The interest to us lies not so much in this as in his indication 
of the presence in the tissues of cue i teas The discovery he 
made meee in the following wo 
** The most singular feature about the plant is the extraordi 
abundance. ee an elastic gum in all the younger tissues—excepting 
9893 A2 
