550 



JOUEXAL OF THE liOYAL HORTICULTURAL SOCIETY. 



' to the head office of the Federation : Ufficio dii-ettivo della Federazione 

 italiana dei Consorzi agrari, Piacenza, Italy. — B. N. 



Gaillardia, a New. By Ch. Grosdemange {Eev. Hort. pp. 337, 

 838 ; July 1901). — Large-flowered form, ^ith orange-brown flowers ; im- 

 provement on ' Toison d'Or ' ; very floriferous ; good habit. — C. T. D. 



Gaura Lindenheimeri. By H. Dauthenay {Rei\ Hort. pp. 327- 

 329; July 1901 ; three woodcuts). — Vers- floriferous. Highly recommended 

 for bouquets and garden culture. Culture easy, but requires winter protec- 

 tion.— C. T. D. 



Geniosporum fissum. By Spencer Le M. Moore {Joiirn. Bot. 464, 

 p. 2r33 ; 8 1901). — Description of a new species, forming the type of a 

 new section, Temnocalyx, from British East Africa. — G. S. B. 



Gentians. By E. Hampden {Gard. Mag. 2,494, p. 529; 17 8 1901). 

 — A descriptive account of most of the species of Gentians in cultivation, 

 with cultural notes. — W. G. 



Geotropism of Stems. By E. B. Copeland {Bot. Gciz. vol. xxxi. 

 p. 410 ; Xo. 6). — Experimental investigations of the geotropic curvature 

 of radicles, the position of the points of bending etc. in dicotyledonous 

 seeds, and in the cotvledons of monocotvledons. — G. H. 



Geraniums, Picturesque Employment of. By Ed. Andre 

 (Bev. Hort. p. 255; June 1901). — Interesting suggestions, with illustra- 

 tions for outdoor decorations. — C. T. I). 



Geranium Disease {U.S.A. Exp. St. Hatch, Reports 12-13, 

 1900-01). — Abundant on leaves of cultivated Pelargonium, and appears 

 to be a dangerous enemy to the gl•o^^i;h of the plant. It causes small 

 yellow and dead spots on the leaves, so that they fall off and the plant 

 becomes nearly denuded. The dead spots are full of bacteria and no 

 other organisms, so that they seem to be the cause of the disaase. To 

 all appearance this seems to be a genuine bacterial disease. — M. C. C. 



Ginkg-o biloba, fertilisation of. By M. S. Ikeno {Ann. Sc. 

 Nat., Botan. t. xiii. p. 305 ; plate 3 ; 1901). — This tree has become a 

 centre of interest since the discovery of its motile ciliated antherozoids a 

 few years ago. The present short paper adds a few new details. Two 

 antherozoids leave the pollen-tube, and the fusion of one of them with the 

 ovum is described and figured. The fate of the other antherozoid was 

 followed as carefully as possible, but it disorganises : this is interesting 

 because of recent observations of this body in higher plants. The process 

 of fertilisation in Ginkgo agrees with that observed in Cycas and other 

 G}Tnnosperms, except Gnetacece. — TT. G. S. 



Gipsy Moth, Extermination of. By Dr. Piorig {Kais. Ges., Div. 

 Biology, bd. i., ht. 2, 1900.) — The caterpillars of this moth are so destruc- 

 tive on fruit and other trees that its combating receives special attention 

 in Germany and the United States. The eggs, wrapped" in a brownish 

 cotton-wool covering, are laid in masses about the size of a grape or 

 larger. To destroy these egg-masses Dr. Eorig describes a simple form of 



