xliv PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



Scientific Committee, March 25, 1902. 

 Mr. A. D. Michael in the Chair, and sixteen members present. 



Narcissus Disease. — Eev. W. Wilks brought specimens in which the 

 bulbs and roots appeared healthy, but the leaves were streaked with 

 yellow, and appeared to be weak and flabby. The malady is widely 

 diffused, but at present no light has been thrown upon its cause. 



Hybrid Tropceolum, &c. — Mr. Worsley showed flowers of a hybrid 

 between T. Lobbianum and one of the garden Tropa?olums. A hexamerous 

 flower of a Tyclcea was also shown, in which the stigma was trifid. A 

 zonal Pelargonium was exhibited in which the edge of the leaf was 

 bordered with red, as happens in decaying leaves, whilst the flowers, 

 usually white, were in this case suffused with salmon-pink in the 

 centre. 



Diseased Violets. — Some specimens from the Moor Hall Gardens, 

 Harlow, in which the leaves were shrivelled, but in which the root- 

 development was very satisfactory, were referred to Mr. Douglas for 

 examination and report. 



Proliferous Strawberry. — Mr. Hooper showed a coloured drawing of 

 a Strawberry, in which small plants were developed on the receptacle in 

 the place where the " achenia " ought to be (see Vegetable Teratology, 

 p. 116). 



Unhealthy Palms. — Mr. Odell showed further specimens of Kentias 

 which confirmed the opinions expressed at the preceding meeting. 



Mites on Begonias. — Mr. Shea adverted to this subject, and elicited 

 the recommendation from the Chairman to burn the roots forthwith if 

 they were attacked by mite. 



Grub on Rose, etc., taken from a tunnel in a Rose Stem. — Mr. 

 Chittenden sent a specimen for naming, and this on being submitted to 

 Mr. Saunders has been determined to be the grub of some hymenopterous 

 insect, such as causes galls on Hoses, especially the form called Bedeguar, 

 or Robin's Pincushion. Mr. Chittenden also sent the seed or pip of an 

 Apple containing two embryo plants — the supplementary embryo having 

 probably been developed from one of the synergida?. 



Peloria in Cattleya. — Dr. Masters showed an illustration of regular 

 peloria in a Cattleya which he had received from Messrs. Veitch. In 

 this flower there were three sepals of equal size and similar form ; alter- 

 nating with these were three regular flat petals, the lip being represented 

 by a petal in size, shape, and colour like the lateral petals. This flower 

 is probably a reversion to the earlier and simpler conformation from 

 which the peculiar Orchid structure, as we now know it, has evolved. 

 The column was in the normal condition. It is noteworthy that this 

 flower was produced from the same seed-pod as the hybrid between 

 Cattleya Schroderte $ and Brassavola Digbyana $ . Evidences of the 

 cross were very obvious in the normal flower, whilst in the peloria the 

 appearance was that of a degenerate Cattleya. 



Cuscuta. — Dr. Bonavia sent a specimen of a shrub from the Riviera, 

 encircled by a Cuscuta, but the species could not be determined. 



Sell izophy Hum commune. — From Chiswick came a fungus found on 



