778 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



" Little Peach " disease, in which the fruit and leaves are much reduced 

 in size, while the root-hairs on the finer roots and even the smallest roots 

 themselves are quite dead. The disease is not common in young trees, 

 those most frequently attacked being from seven to twelve years old. 

 The most regular and heavy bearers are those most frequently attacked, 

 and death appears to occur in about two years. At present the disease 

 appears to be confined to Michigan. The cause of the disease is unknown ; 

 various causes have been attributed ; it is possible that adverse soil 

 conditions are answerable at least in part for the injury, but a fungus 

 (unknown) is present on the roots in all cases. — F. J. C. 



Peach ' Opoix.' By Louis Tillier {Rev. Hort. p. 408 ; September 

 1, 1902). — Coloured plate representing a very fine late Peach, described as 

 a good bearer and highly recommended. Originated in Russia, distributed 

 by M. Boucher, 164 Avenue d'ltalie, Paris.— C. T. D. 



PeaP, ' Conference.' By C. Mathieu (Gartenflora, p. 449, pi. 1502. 

 1 9 1902). — A coloured plate and description of the fruit.— J". P. 



Pears and Apples, Preservation of, by Gum Arabic (Rev. 

 Hort. p. 200 ; May 1, 1902).— Sound fruit dipped in a solution of 500 

 grammes of gum to the litre of water and then dried remain sound until 

 the following autumn. When required for use they are placed in water 

 for two or three hours and then rinsed and dried. 'While gummed they 

 remain absolutely in statu quo as when gathered, and can be subsequently 

 matured after washing. — C. T. D. 



Pear-trees, Pyramid. By G. Wykes (Garden, p. 220 ; 27 9/1902). 



— A practical article about the culture of pyramid Pear-trees and the 

 best varieties for the purpose, with two excellent illustrations of trees in 

 the Royal Horticultural Society's Gardens at Chiswick. — E. T. C. 



Pentanisia. By Spencer Le M. Moore (Journ. Bot. 475, pp. 251, 252 ; 

 7 1902). — Descriptions of two new species, P. scricocarpa and P. rho- 

 desiana, collected by Dr. Rand at Salisbury, Rhodesia, from specimens in 

 the National Herbarium. — G. S. B. 



Petrea volubilis. By G. Besoke (Die Gart. p. 521 ; 2/8/1902).— 

 A pretty climber for temperate houses. The strong flowers are star- 

 shaped, the centre deep blue, margin of a paler blue. — G. R. 



Phalaenopsis x leucorrhoda (Cogniaux in Diet. Icon. Orch., PhaL 

 x pi. 1; G 1902).— A fine form of what is generally considered to be a 

 natural hybrid between P. Aphrodite and P. Schilleriana, introduced from 

 the Philippines in 1874, by Messrs. Low & Co., together with its supposed 

 parents. Flowers white, suffused with rose. — C. C. H. 



Pineapples, Cultivation Of. By W. Cradwick, Travelling In- 

 structor {Bull. Bot. Dep. Jam. ix., Pt. 5, p. 68).— This paper discusses 

 the soil, drainage, preparation of soil, selection of suckers, planting, and 

 cultivation. — G. H. 



