XXVlll PKOCEEDINGS OF THE KOYAL HORTICULTURAL SOCIETY. 
correspond with a single carpel, but covered the half of one and the half 
of the adjacent carpel, so it would represent two halves of different car- 
pellary leaves. Secondly, striped flowers are probably the result of 
crossing two whole-coloured flowers. This is obviously the case with 
Petunias, a purple and white-flowered species having been the parents of 
all our garden forms. So that it would seem more probable that the 
Orange had received the pollen of a smooth-skinned variety, and the 
tubes penetrating one placenta, common to two adjacent carpels, had 
influenced the surface on both sides of the division. Similar stripes have 
been known to occur on the fruit of one variety, of Theobroma (Cocoa) 
when pollinated by a second variety (see next page, and also vol. xxiii. 
p. 383). 
Scientific Committee, Makch 13, 1900. 
Dr. M. T. Masters, F.E.S., in the Chair, and seven members present. 
Grapes diseased. — Mr. Hudson brought some specimens which 
appeared to be attacked with the fungus Glasosporium. Dr. Masters 
undertook to examine it further. 
Douglas Fir diseased. — Branches were received from Mr. Rogers, of 
Penalowne, Cornwall. They were from young trees' planted in an old 
plantation. In some cases the whole tree was unhealthy ; but in others 
the trees grow vigorously, and only the top dies. They were referred to 
Dr. William G. Smith for examination. 
Pear Stem constricted. — Mr. Rogers also sent a specimen remarkably 
constricted by a staple. The diameter of the stem, being 2 inches, was 
reduced to half an inch at the constriction. It had borne good crops of 
fruit up to last year. 
Ahies amahilis attacked by Chermes. — Dr. Masters showed specimens 
of this tree, also called A. Lowiana, with gouty branches. The bark was 
badly infested by an aphis much resembling that which attacks Beeches. 
The same remedy of syringing with petroleum emulsion is to be adopted 
if the trees be slightly infested ; otherwise the only means of destroying 
the pest is to destroy the tree by burning. 
Hydnora africana. — Dr. Masters also showed a specimen of this 
remarkable parasite. It is a fleshy, leafless plant, parasitic upon plants 
of the genera Cotyledon and Euphorbia in tropical and South Africa. 
There are about eight known species. The specimen was received from 
Orahamstown. 
Scientific Committee, March 27, 1900. 
Dr. M. T. Masters in the Chair, and seven members present. 
Fringed Cyclamen. — Dr. Masters exhibited, from the collection of 
Cyclamens brought by the St. George's Nursery Co., Hanwell, to the 
Drill Hall, a leaf of their fringed Cyclamen, in which not only the flowers 
were fringed, but the leaves were deeply lobed, and the lobes themselves 
were lobulate and bilobulate, the ultimate lobules being irregular in size 
and, in some instances, shortly stalked, thus presenting an appearance 
