458 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Amelanchier spicata, Abnormal Flowers of. By J. J. Clark 



(Ann. Bat. vol. xxvi., July 1912, pp. 948, 949). — A case is recorded 

 of the petals of Amelanchier spicata becoming staminoid. Double 

 flowers resulting from the petalody of the stamens is frequent enough 

 in Rosaceae. but the reverse is unusual. The petals in the specimens 

 described show more or less infolding of their lateral margins, and in 

 extreme cases developed at their tips anthers in which pollen-grains 

 were found. The flowers were abnormal in some other respects. 



A. D. C. 



American Blight (Schizoneura lanigera). By W. W. Froggatt 

 (Agr. Gaz. N.S.W., vol. xxiii. pp. 520-528). — American blight or 

 woolly aphis attacks the roots and the branches of apple trees. 

 Treatment of the diseased trees with carbon bisulphide is not advised, 

 as the trees are not protected from future attacks and may be injured. 

 A better plan is to lay bare the roots in a circle of two feet from the 

 trunk, scrape the galls on the roots, spread three pounds of waste 

 tobacco over the exposed roots, fill in with earth and pour a bucket 

 of water on the trunk, or instead of tobacco drench the roots with 

 kerosene emulsion. To clean the branches, fumigate with hydrocyanic 

 acid at intervals of six weeks, or spray with red oil or kerosene emul- 

 sions. On the small scale paint with castor oil or raw linseed oil. 



S. E. W. 



Amorphophallus corrugatus (Bot. Mag. tab. 8475). — Siam. 

 Family Aroideae, tribe Pythonieae. Herb, tuberous. Leaf 

 solitary; petiole 1J-2 feet long, dirty-green with tawny blotches; 

 blade 3-partite. Peduncle 10-22 inches long. Spathe erect. 3-6 inches 

 long, hooded, green and mottled with white, margins purple. Spadix, 

 female portion tawny-purple, male portion rose ; appendix corru- 

 gated, ochre-yellow. — G. H. 



Anemones and Ranunculus (Rev. Hort. Sept. 16, 19T2 ; p. 414). — 

 It has been found that the dormant roots of these, if kept under such 

 dry conditions as to prevent growth at the normal season, may, after 

 the period of rest is long over, be planted and will grow and flower at 

 practically any desired season, while the flowers are finer and more 

 double than when planting is done under the ordinary conditions. The 

 Dutch make a speciality of these retarded roots. — C. T. D. 



Apple Blister Canker and Methods of Treatment. By W. 0. 



Gloyer (U.S.A. Exp. Shi., Ohio, Cir. 125). — Apple Blister Canker is 

 due to the attacks of Nummnlaria discreta. It is a serious disease 

 of apple trees in the United States, and has also been reported on 

 Magnolia and S or bus. 



It was first described in America by Schweinitz in 1834 and was 

 known in France in 1863. 



Large cankers appear on the limbs and trunks of apple trees, the 

 heart- wood becomes discoloured, the epidermis peels off, exposing 

 the tan-coloured stromata of the fungus. 



