XCli PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



Variation in variegated elm. — He also drew attention to a communication he 

 had received from a correspondent relative to variations in the degree of white- 

 ness seen on foliage of the variegated common elm. His correspondent, Mr. 

 Lawrence of Henley, had seen in Gloucestershire a tree in a hedgerow which was 

 reported to be perfectly green when the summer was going to be a wet one, but 

 almost white when it was going to be dry. It is well known that this elm varies 

 very much in the degree of variegation, and it is probable that the water supply 

 at critical times has a great deal to do with the amount of whiteness in the foliage, 

 but it is improbable that the variegation is in anticipation of the weather condi- 

 tions, rather it is dependent upon them. 



Scientific Committee, July 15, 1919. 

 Mr. E. A. Bowles, V.M.H., and five members present. 



Virescent Campanula Medium. — Mr. G. Wilson showed a curious form of 

 Campanula Medium with a virescent perianth, stamens generally absent but 

 occasionally present, and the style usually more or less developed. Dr. Rendle, 

 who examined the flowers, found also the ovary sometimes normal, but some- 

 times deformed, and a good number of ovules in all the flowers he examined. 



Prolongation of axis in Primula cashmeriana. — Col. Warrender sent an in- 

 florescence of P. cashmeriana with a leafy growth at the apex of the flower stem, 

 but with the bracts normal. 



Willow galls. — Mr. Fraser showed a number of the tassel galls of the willow 

 in course of development, for comparison with one brought last week by Mr. 

 Holmes. 



Teucrium Botrys. — Mr. Fraser also brought specimens of this uncommon plant 

 from Box Hill and Banstead Woods, where it is native. It appears often to 

 be bitten down by rabbits. 



Aquilegia with four cotyledons. — Miss M. W. Rogers of Hoyle sent a seedling 

 Aquilegia with four cotyledons. She said she often found them with three, but 

 this was the first she had seen with four. " The first rough leaves appear to have 

 been produced in pairs. A tri-cotyledonous carnation produced two whorls of 

 three leaves each, but all the later leaves have come in pairs. Severai tri- 

 cotyledonous Antirrhinums seem to produce leaves and branches in threes con- 

 tinuously, but the lateral branches, except in one plant, produce opposite leaves. 

 In the exceptional case the two bottom whorls of branches themselves produce 

 leaves in three, but the later branches have leaves in pairs." 



Scientific Committee, July 29, 1919. 

 Mr. E. A. Bowles, V.M.H., in the Chair, and three members present. 



Mentha arvensis forms. — Mr. J. Fraser showed dried specimens of a number of 

 forms of Mentha arvensis which he had collected in various localities. Some of 

 them appeared to be hybrids between that species and other related ones. 



Lycaste Deppei two-flowered. — Miss I. J. Laurie sent a specimen of Lycaste 

 Deppei with a two-flowered spike. This condition is very unusual, although it is 

 occasionally seen in some other normally one-flowered species, such as L. 

 Skinneri. 



Tomato with virescent flowers. — Mr. Stevenson sent a tomato with virescent 

 flowers. The early flowers had been normal and had produced fruit, the later 

 were all alike, virescent and sterile. 



Gladiolus W atsonioides. — A Gladiolus from Mr. Williams' garden at Llandaff 

 was sent for naming. It proved to be G. W atsonioides from Mt. Kenia, figured 

 in the Bot. Mag. t. 6919. 



Various plants. — Mr. H. J. Elwes sent specimens of Gerbera Delavayi, Roscoea 

 purpurea capitata, Campanula amabilis, and Alstroemeria Hookeri from his own 

 garden. 



Hybrids of Lathyrus, etc. — Mr. Marsden Jones showed hybrids between 

 Lathyrus rotundifolius $ X L. tuberosus <J . He had made twelve crosses in 

 July 191 5, and obtained three pods, containing ten seeds. Of the seven sown in 

 19 16 all germinated, and one commenced to flower in the same year. There are 

 three types, one with flowers as large as those of L. rotundifolius, one with smaller 

 flowers, but larger than L. tuberosus. They have flowers with a red-toned salmon 

 standard and pomegranate purple wings, and they are upright in habit like 



