58G 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



seeds are formed, and laying down to grass after manuring heavily, have 

 been found successful. In addition, chemical agents may be used, which, 

 although effective, are difficult to apply over large areas. — E. F. H. 



Canker FungfUS, The (Nectria ditissima). Anon. {Jour. Bd. Agr. 

 vol. viii. No. 1, pp. 12 14 ; June 1901 ; with a plate, figs. 1-3). — This form of 

 " Canker " is recognised by the characteristic wounds or cracks and swell- 

 ings made on the branches of various fruit and forest trees. The nature 

 and various stages of the fungus are described and illustrated. It is 

 recommended that all diseased branches should be removed, and " the 

 cut surface luted with clay or protected with a coat of gas-tar." It 

 is further recommended that grafts should not be taken from diseased 

 trees, and that a solution of 1 lb. of sulphate of iron to one gallon of 

 water will kill the " white stage " of the fungus as well as moss and 

 lichens. — B. N, 



Canker in Apple-trees {Amer. Gard. xxii. pp. 412, 413, figs. 89, 

 90; 8/6/1901). — A popular description of the New York Apple-canker 

 caused by Sphceropsis vialorum. It is very common in the State 

 of New York and is quite distinct from our European apple-canker 

 {Nectria ditissima). The American canker fungus attacks Apples, 

 Pears, and Hnwthorn-trees, as well as Apple, Pear and Quince fruits. 

 Sunscalds and mechanical abrasions appear to be necessary to enable 

 the pest to get a foothold. As a preventive of this disease, a thorough 

 spraying with Bordeaux mixture is recommended, together with a good 

 lime-wash, to prevent sunscald. Full details may be found in Bulletin 

 No. 185 of the Geneva (N.Y.) Station.— C. C. H. 



Canker in Fruit Trees. By M. Passy {Bcv. Ilort. p. 299 ; July 



1901). — Due to Nectria ditissima, and not to the woolly aphis, which only 

 prepares a suitable nidus for infection from other infested trees. — C. T. D. 



Cannas, Largre-flowered. By G. G. {Gard. Mag. 2,486, p. 238; 

 22 6/1901). — An excellent account of the best varieties of Cannas, old 

 and new, of which a descriptive note is given of each of the thirty 

 selected varieties. Cultural details are given, and an illustration of the 

 variety ' Oscar Dannecker.' — W. G. 



Caoutchouc Regions of the Amazon {Not. Konig. Bot. Berlin, 

 No. 26, B. iii. ; July 1901). — A report on various india-rubber plants. 



M. W. 



Cattleya labiata, var. Trianae, Armand de Meulenaere. By Ch. 

 Pynaert {Bev. Hort. Beige, t. xxvii. p. 217, Col. pi. ; Oct. 1901).— In the 

 possession of M. le Marquis de Wavrin, whose collection of Orchids is 

 described. The flowers are 6^ inches across the lateral sepals ; pale pink, 

 tipped with carmine ; the lip, 2 inches long, witli crimped margin and a 

 deep crimson circumferential zone, and yellow in the throat. — G. II. 



Cattleya * Rene Andre.' By Ed. Andre {Bev. Hort. pp. 332, 

 833 ; July 1901). — Coloured plate and woodcut. Natural hybrid from 



