GENERAL INDEX 



239 



Water plants, 178. 



Weed communities, 117, 120, 124. 



flora, introduced or alien, 4, n. 



of gateways, 16, 183. 



paths, 183. 



rick sites, 185. 



shady places, 177, 185, 186. 



trodden places, 183, 184. 



Weeds harmful to farm products, 112- 



116. 

 human beings, 103-12. 



live stock, 103-12. 



Wheat, 5, 6, 7, 52, 58, 70, 102, 105, 



112, 114, 160-74. 



Willow-herb, 23, 25 (fig.). See also 

 Epilobium spp. 



Willow-weed, 66, 70, 76, 117, 131, 133, 

 I 5 I > *57i 169, 188, 220. See also 

 Persicaria. 



Wind, weeds distributed by 17, 21. 



Winged fruits, 21, 22 (fig.). 

 - seeds, 21, 22 (fig.), 99. 



Woad, 194. 



Woburn Experimental Station, 53. 



Woodwax, 35 (fig.), 37, 66, 115, 176, 

 179, 188, 194, 214. 



YARROW, 17, 28, 115, 128, 151, 179, 



182, 188, 206. 



Yellow Rattle, eradication, 99. 

 Yorkshire Fog, 2, 27, 44, 176, 179, 185, 



215- 



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