- 136 - 



explosive fruit characteristic of this genus could certainly not shoot 

 its seeds across the traffic of a London street. Possibly cats may 

 be effective as agents of distribution in this case, and they may 

 also account for the presence of cleavers (Galium Aparine\ the 

 hooked fruits of which would readily cling to their fur. 



Among garden escapes, the marigold, nasturtium (Tropaeolum\ 

 wallflower, and a species of Prunus can be observed, as well as the 

 opium poppy mentioned above ; in connection with these, and with 

 many of the wild species also, the neighbourhood of Covent Garden 

 must be recalled. 



The above list is by no means exhaustive, none of the grasses, 

 for instance, having been mentioned ; in one or two cases the iden- 

 tification had to be made from a distance and through the fence 

 surrounding the waste ground. 



The Selborne Society has been investigating a still more in- 

 teresting building site in Farringdon Street, in London, scarcely 

 removed from the heart of the city. Although this plot has only 

 been cleared for about two years, no fewer than twenty-eight 

 species of flowering plants and ferns have established themselves 

 upon it. Mosses, liverworts and others of the more simple plants 

 are also represented. Mr. J. C. Shenstone is preparing a detailed 

 list, which will be published in the October number of the Sel- 

 borne Magazine. 



SAMUEL MARGERISON. The Vegetation of Some Disused Quar- 

 ries. The conquest of new ground by plants. (Bradford 

 Scientific Journal, 1909, pp. 52. Sketch map and illustr.) Reviewed 

 in Geographical Journal, Vol. XXXV, No, 6, June 1910. 



L. S. KLINCK. Individuality in Plants. (Supplement to the 

 Journ. of the Board of Agric., vol. XVII, No. 3. - - London, 

 June 1910, p. 37). Papers read at meeting of the British Asso- 

 ciation for the Adv. of Science at Winnipeg, Aug, 1909. 



No two plants are exactly alike ... In well established varieties 

 of oats of known breeding and purity some strains have been iso- 

 lated which ripened two weeks before others, and equally striking 

 differences have been observed and perpetuated. This holds true 

 under practically every heading under which oats are judged in the 

 field or in the laboratory. Even among the most productive indi- 

 viduals the range in yield is surprising; the area covered in the 

 third generation from one kernel of Joanette Oats in one case 



