(HO JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Cupressus, The Pollen-tube of. By H. 0. Juel (Flora, vol. xciii., 

 1904, pp. 56-62, t. iiL). — The pollen-tube of Cupressus contains one 

 generative and two vegetative nuclei ; the former early gives rise by 

 repeated divisions to as many as 20 sperm-nuclei, each of which may be 

 functional. The large number, as contrasted with that of two of most 

 gymnosperms and gametophytes, suggests a possible early divergence of 

 the Cypresses from the Conifer stem. The author indicates a com- 

 parison with the multicellular pollen-grain of Cordaitece, but does not 

 venture to press the comparison. As a fixative for dense masses he 

 recommends the formula : 



Zinc chloride g m , 2 



Glacial acetic acid cc> 2 



Alcohol, 45-50 per cent. . . . . cc. 100 



M . H. 



Cydonias. By W. J. Bean (Gard. Chron. Xo. 887, p. 434, figs. 168, 

 169, and 170 ; Dec. 26, 1903).— In this article the various species belong- 

 ing to the genus Cydonia are described and commented upon. — G. S. S. 



Cypripedium Fairieanum. By 0. Opoix (Rev. Hort. June l, 

 1903, pp. 255-71).— Woodcut, list of 20 hybrids with same, and cultural 

 directions.— C. T. D. 



Cyppipediums, Hardy. By G. B. Mallett (Gard. Chron. No. 855, 

 p. 307; May 16, 1903; continued in Xos. 858 and 859; figs. 138 and 

 146).— The author in this paper gives a description and the best means 

 of cultivating some ten different species, and figures are given of C. 

 japonicum and C. pubescens. Most of the species are American, but 

 some are European or Asiatic. The various difficulties likely to be met 

 with in the cultivation of these plants are fully dealt with. — G. S. S. 



Cyppipediums, Hardy {Gard. p. 41 ; 18/7/08).— Few hardy plants 

 are more admired than the Lady's Slippers. Their popularity is well 

 deserved, and as it becomes realised that these Orchids are perfectly 

 hardy in British gardens the demand will increase. C. spectabile, 

 C. pubescens, C. Calceolus, C. acaule, and C. macranthon are the best, 

 and these are described and their culture detailed.— T. C. 



Cypripediums, Hardy, and their Cultivation. By L. Lenioine 

 (Le Jard. August 5, 1903, p. 236).— It is useful to compare the treatment 

 of these in France, as several of them are hard to keep in England. 



( a W. D. 



Dahlias {Journ. Hort July 23, 1903, p. 81).— It is asserted that the 

 Dahlia was first introduced to Europe for its edible qualities, the roasted 

 root being good and wholesome as a Potato.— C. W. D. 



Dahlias 1 a Collerette.' By G. Legros (Rev. Hort. July 1, p. 305-7 ; 

 1 woodcut). —Two varieties described, 'Joseph Goujon ' and ' President 

 \iger.' Tin- li-un represents a broad-petalled, somewhat reflexed, lily- 

 ike flower of single type, but with a number of slender elongated florets 



