SCIENTIFIC COMMITTEE. 
ci 
Scientific Committee, November 6, 191 7. 
Mr. E. A. Bowles, M.A., F.L.S., F.E.S., ki the Chair, and eight members present. 
Twin Vegetable Marrows. — Mr. J. Fraser, F.L.S., showed a Vegetable Marrow 
with two adnate fruits, and remarked that a considerable number of similar 
instances had come to his notice during the present year, the twin fruits being 
sometimes separate. 
Many-seeded Apples. — He also showed seeds taken from varieties ' Duchess 
Favourite,' ' Winter Quarrenden,' and ' King of the Pippins,' showing seeds 
in excess of the normal number, 10. Such excess number, up to 20, appears 
to be fairly constant in some varieties, e.g., ' American Mother,' where four 
ovules in each carpel appear to be normal. 
Proliferation in Rhododendron Flowers. — Mr. W. C. Worsdell showed flowers 
of Rhododendron bearing a second flower, a prolongation of the axis through 
the ovary. He drew attention to the fact that the axis was normally prolonged 
through the ovary in this plant. 
Variation in Leaves of Morus, &c. — He also commented upon the occurrence 
of both simple and lobed leaves in plants of the genera Morus and Broussonetia. 
He suggested that possibly the lobed leaf was a primitive, the entire a less 
primitive character in these genera, for strong shoots usually bear lobed leaves. 
Specimens of Morus acidosa shown were almost all lobed, while in many species 
of Morus and Broussonetia simple leaves are the rule. 
Buds on Roots of Solanum Dulcamara. — Dr. Rendle showed a plant of Solanum 
Dulcamara with a stout root bearing numerous buds all along its length. 
Scientific Committee, November 20, 191 7. 
Mr. E. A. Bowles, M.A., F.L.S., F.E.S., in the Chair, and four members 
present. 
Fruiting of Wistaria. — Mr. Bowie? showed fruits of Wistaria multijuga, which 
frequently fruits in his garden, though less profusely this year than in the past 
season ; and of W • sinensis now fruiting for the first time in his garden. 
Wheat-ear Carnation. — He also showed from Mr. R. Page a specimen of the 
well-known Wheat-ear Carnation where a multiplication of the bracts takes the 
place of the flower. 
Insect Attack on heaves of Iris foetidissima. — He also brought from his garden 
leaves of Iris foetidissima with the larvae and pupae of a mining Dipteron sp. ? 
Several of the larvae feed together in the leaf and pupate in colonies. 
Loganberries attacked by Gall on Stem. — Mr. J. Fraser, F.L.S., showed stems 
of Loganberries attacked by a gall on the stem, similar to those on the stems of 
Brambles and Raspberries recently shown, and probably due to the attack of 
the fungus Coniothyrium sp. 
Scientific Committee, December 4, 191 7. 
Mr. E. A. Bowles, M.A., F.L.S., F.E.S., in the Chair, and six members " 
present. 
Calystegia Sepium rosea. — Mr. J. Fraser, F.L.S., showed specimens of the 
pink form of C. Sepium which he had collected in apparently wild localities in 
Surrey. Possibly the seed was carried by some means from a garden, for the 
variety is often seen in gardens. 
Convolvulus arvensis hastatus. — He also showed a curious form of the common 
Bindweed with very narrow leaves which he had found near Molesey, and it was 
found to agree with the description of the variety hastatus. 
House Refuse. — Mr. J. Hudson showed a sample of finely powdered house 
refuse which was being offered as a manure. Since such samples contain large 
quantities of coal ashes it is unlikely that their value will be great, though if it 
is to be had for a nominal sum, and at small cost for carting, the material may be 
worth using. It is bound to be somewhat variable in composition. 
Supposed Influence of Light on Fasciation and Flower Production. — Col. H. E. 
Rawson showed further illustrations of fasciation appearing in plants of 
Tropaeolum tuberosum which were screened in the open garden. Successive 
