SCIENTIFIC COMMITTEE. 



cxvii 



A Certificate of Appreciation was unanimously recommended 

 to Mr. Dykes for his work in raising these Irises. 



Frost Damage. — Mr. F. J. Chittenden showed Apple fruits about 

 an inch in diameter which had been damaged by the severe frost 

 on May 26 (at Wisley, 19° Fahr. on grass, 25° on post on the hill — 

 probably lower in lower grounds). The flesh was in some cases only 

 shghtly-tinted brown about the vascular bundles, but in more severe 

 attacks the cells had become greatly disorganized and the tissues 

 broken. None of this damage was to be seen externally. The fruit 

 on the trees on the hill had completely escaped damage, but that in 

 the lower ground was very severely injured, although the fruits had 

 not yet dropped. 



Double Claytonia sibirica. — Mr. Chittenden also showed flowers of 

 a double form of Claytonia sibirica from the Wisley Garden, in which 

 the doubling in some cases was not confined to the petals, but three or 

 four pistils had been produced as well (see below). 



Scientific Committee, June 16, 1914. 



Sir John T. D. Llewelyn, Bart., V.M.H., in the Chair, and seven 



members present. 



Fasciated Daisy. — Mr. A. Worsley said that the fasciated daisy 

 which he sent to the last meeting comes true from seed. 



Doubling in Claytonia sibirica. — Mr. W. C. Worsdell, F.L.S., re- 

 ported that he had examined the double Claytonia which was shown 

 at the last meeting, and found the doubling to be due to multiple 

 dichotomy or fasciation of the flower, i.e., the flower branches into a 

 number of equivalent secondary flowers. These are of various grades 

 of imperfect development, possessing no calyx, and sometimes no 

 coroUa. Some of the secondary flowers consist only of a small pistil 

 and one or two stamens, and are stalked. The branching takes place 

 within the calyx of the primary flower, which is thus common to the 

 whole. In some flowers almost the only abnormality consists in the 

 presence of an extra corolla within the normal one, the whorl of five 

 stamens being present. In others petalody of some of the stamens 

 has occurred. 



Wild Almond "from the Cape. — Mr. W. C. Worsdell exhibited the 

 very hairy fruits of the so-called " Wild Almond " of the Cape, Brabejum 

 stellulifolium. The fruits contain a single seed, which has a flavour 

 similar to that of the common acorn. The plant belongs to the 

 Proteaceae. 



Leaf Spots produced by Red Spider. — Mr. E. M. Holmes, F.L.S., 

 showed foliage of Prunus virginiana which had been attacked by red 

 spider, with the result that bright red spots had been produced upon it 

 similar in appearance to those regarded as due to " burning " or sun- 

 scorch. 



Cabbage-root Maggot. — Several specimens of Brussels Sprouts, 



