NOTES AND ABSTRACTS. 



781 



were measured, and the results showed a marked difference in favour of 

 those planted earliest. E.g. ' Lady Margaret Boscawen ' gave 2 ft. 

 from August planted bulbs as against 1 ft. 7 in. from those planted 

 in November. ' Cassandra,' 1 ft. 10 in. as against 1 ft. 4 in. Other 

 illustrations of the same effect are given. 



E. H. Jenkins in the Garden, September 10, 1910, p. 454, gives 

 the same advice and supports it by somewhat similar illustrations. 



H. R. D. 



Dahlia, Origrin, Culture, and Diseases of. By K. Schechner 



(Oestr. Gart. Zeit. vol. v. pt. xi. pp. 422-430).— The Dahha, a native 

 of Mexico, appeared in England for the first time in 1787. The Cactus 

 Dahlia is a spontaneous variation. It was found in a miscellaneous 

 collection of seeds, bulbs, and tubers sent by van den Berg from 

 Mexico to Holland. It had never been observed in Mexico in the wild 

 or cultivated state. By crossing it with other varieties a large number 

 of new kinds have been derived. — S. E. W. 



Dahlias, Parisian. By A. Miller {Rev. Hort., April 16, 1910, 

 pp. 180-181 ; col. plate). — The plate represents five very showy parti- 

 coloured varieties of single Dahlias — ' Paris ' crimson, bordering a 

 broad white centre to each petal; ' Tour St. Jacques,' deep magenta 

 with white central strip on similar lines; 'La Seine,' yellow with 

 deep orange-marked tips; * Observatoire,' white with pale-yellow 

 margins; and ' Opera,' yellowish centre to petals, bordered deeply 

 with red. Bordering well defined and handsome in 1, 2, 4, and 5. 



C. T. D. 



Daphne Mezereum, Paul's White. By E. A. Bowles {Garden, 



May 21, 1910, p. 255). — This is the best form of the white Daphnes. 

 Though the plants are not long-lived, they are easily raised from seed. 

 They are useful for contrasting with the red varieties and the purple- 

 leaved form. The ground underneath may be carpeted with Cyclamen 

 Coum, ibericum, and Atkinsoni, which flower at the same time and 

 carry .out the same colour effect. — H. R. B. 



Demi-lysol, A New Insecticide. By Professor H. Zimmer- 

 mann {Oester. Gart. Zeit. vol. v. pt. i. pp. 5-13). — Fruit trees and 

 shrubs can be freed from scale by one winter spraying with a 10 per 

 cent, solution of demi-lysol, followed by treatment with a 1 per cent, 

 solution towards the end of May or beginning of June. Green fly, 

 black fly, woolly aphis are also destroyed by one application of the 1 per 

 cent, solution. To avoid damaging the foliage of apple trees it is 

 advisable to use a f per cent, mixture, spraying twice in the course of 

 a week. Demi-lysol should be mixed with soft water. A 1 per cent, 

 mixture containing equal quantities of demi-lysol and ¥3 is particularly 

 ef&cacious. Demi-lysol must not be used in conjunction with liver of 

 salphur, as the mixture damages the foliage. — S. E. W. 



Dendrobium from Annam. By U. Dammer {Orchis, vol. iv. 

 pt. i. pp. 9-11). — A Dendrohium (to which the author nssigns ilie name 



