XXxiv PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



One of the calyx lobes in one fruit was somewhat foliose — an unusual 

 character in the Orange. (Fig. 28.) 



Pyronia X. — Messrs. J. Veitch & Sons sent a fruit raised from 

 Quince x Pear ' Bergamotte Esperen.' A fruit from this cross has 

 already been shown under the name Pyronia x * John Seden. ' The 

 present example was borne on a second seedling from the same parent 

 fruit. It was highly aromatic and much more rounded than the fruit 

 previously shown. The flesh was firm and cream in colour, the eye 

 sunken and the cells open, one containing an apparently well-developed 

 seed. 



Diseased Tulips. — Messrs. Lowe & Shawyer sent some Tulips 

 having poorly developed and brown-blotched leaves, the vascular tissue 

 being marked with brownish streaks. They were referred to Mr. 

 Massee for further examination. 



Fumigation loith hydrocyanic acid gas. — Mr. Hales referred to 

 some results obtained at Chelsea Physic Garden lately in fumigating 

 with hydrocyanic acid gas. The fumigation had been done on a very 

 dull day, and the house had not been damped down for two days 

 previous to the operation. The fumigation was with material of 

 ordinary strength, but it had failed to destroy all the mealy bugs, and 

 had caused cxDnsiderable injury to many plants, especially those with 

 somewhat succulent leaves, such as Olivias. 



Scientific Committee, March 5, 1912. 



Mr. E. A. Bowles, M.A., F.L.S., F.E.S., in the Chair, with 

 eighteen members present, and W. Backhouse, visitor, present. 



Diseased Tulips. — Mr. Massee, V.M.H., reported that the Tulips 

 referred to him at the last meeting as making poor growth and showing 

 brown spots on the foliage and brown flecks in the tissues of the stem 

 had been attacked by the fungus Botrytis cinerea, which had appar- 

 ently infected the foliage from the air in the first place — not from 

 sclerotia in the soil, as is frequently the case. 



Disa sagittalis. — Messrs. Veitch showed this species from S. Africa 

 under the name D. caulescens., to which it is allied. It received a 

 Botanical Certificate in 1890. Messrs. Veitch also showed a mal- 

 formed Cypripedium Fairrieanum in which the scape was almost 

 entirely suppressed. 



Galls on Oak. — Mr. Aldersley sent a branch of Oak having roundish 

 swellings of considerable size at intervals along the branches. A fun- 

 gus, Dichlaena quercina, was probably the cause of these growths, which 

 occur with considerable frequency on young Oaks, but rarely upon 

 old ones. 



Grapes hilled hy fog. — Some small flowering shoots of Grapes were 

 sent to illustrate the damage done by London fogs, which had caused 

 the growths to turn quite brown and shrivel. 



Narcissus seedlings, &c. — Mr. Worsley made some remarks upon 



