NOTES AND ABSTRACTS. 



631 



bacteria (see Journ. R.H.S. xxvii., Sept. 1902, p. 35, PI. II., fig. 40), is 

 produced by the puncture of aphides. That aphides and not bacteria are 

 responsible for the trouble is shown by the fact that the injuries are not 

 accompanied in the earlier stages by fungi or bacteria. The aphides, 

 therefore, are not simply bacteria-bearers. Similar injuries also result 

 from the attack of thrips. Another form of the disease may be caused by 

 red spiders. Hence the name of " bacteriosis " is inappropriate, and that 

 of " stigmonose " should be substituted. It is believed that the insect 

 injects some irritating substance into the wound, which sets up changes 

 which finally result in death to the plant. This disease may be success- 

 fully combated by proper selection of cuttings, careful propagation, good 

 soil, proper amount of moisture, light, and air ; and destruction of aphides, 

 thrips, and red spider. — M, C. C. 



Carnation, The Malmaison. By James Douglas, V.M.H. (Gard. 

 p. 389; 5/12/03). — An exhaustive article dealing with the propagation, 

 varieties, culture, and other points concerning this Carnation. The best 

 flowering season for Malmaison Carnations is during May, June, and part 

 of July, before the Picotees and Border Carnations. No manure should 

 be used, as it causes a coarse, sappy growth, and predisposes the plants t j 

 rust and other diseases. — E. T. C. 



Casuarina stPicta. By T. C. Frye (Bot. Gaz. vol. xxxvi. No 2, 

 p. 101, pi. xvii). — The author first gives a resume of Treub's investiga- 

 tions, and then describes his own on C. stricta, and draws a comparison 

 with Treub's observations on C. Rumphiana, glauca, and suberosa ; first 

 as to points of agreement, and then, those in which the author differs, viz. 

 as to the origin of the sporogenous tissue, arising from the hypodermal 

 archesporial plate, &c. Additional facts are the "double fertilisation," 

 there being two sperms, crescentic in the embryo-sac, and spherical in 

 the pollen-tube. — G. H. 



Caterpillar Webs. By L. Vigneau (he Jard. July 20, 1903, p. 

 221). — An excellent method to effect their destruction fully described. 



C. W. D. 



Cattleya Lucieniana. By R. A. Rolfe {Orch. Rev. Sept. 1903, 

 p. 282). — The identity and interesting comparisons are made with this 

 supposed natural hybrid between C. Loddigesii and C. Schilleriana. 



H. J. C. 



Cattleya SCita. By R. A. Rolfe (Orch. Rev. Aug. 1903, p. 254).— 

 Particulars are here given of this supposed natural hybrid, and informa- 

 tion is sought as to what has become of the original plant. — H. J. C. 



Ceanothus 'Ciel de Provence.' By Ed. Andre (Rev. Hort. 



July 16, 1903, pp. 332-3 ; coloured plate).— Interesting note re three 

 geographical sections of this genus, North American, Mexican, and Cali- 

 fornian, and their relative hardiness or tenderness. The variety figured 

 appears very attractive, inflorescence resembling Lilac in form and colour ; 

 flowers freely and successively. — C. T. D. 



