22 



COMMON WEEDS 



Strand in London, which has for several years been 

 unoccupied by buildings. It was found during the 

 summer of 1907, by a botanical representative of the 

 Graphic? that no less than fifty-five species of plants 

 had become established since the old buildings had 



Photo, 1908. 



H. C. Long. 



FIG. 2. A weed-distributing area : showing an abundance of Thistles and other 

 weeds in flower, and a big crop of leaves of Coltsfoot. Photographed about 

 June on a suburban building plot. 



been removed some years previously. These may 

 have been brought by the wind, or by birds, or intro- 

 duced with rubbish, the contents of window-boxes and 

 horses' nose-bags. (5) A very common source of infes- 

 tation consists in the seeding of weeds in waste corners 

 on the farm, round farm buildings, and in the neighbour- 



1 Journal of Horticulture, August 8, 1907. 



