26 



WEEDS OF FARM LAND 



A considerable amount of seed distribution is probably 

 carried out unconsciously by human beings, as seeds of many 

 kinds of wild plants have a habit of working their way into 

 pockets and folds of the clothes. The following weed and grass 



B 



FIG. 10. HOOKED FRUITS. 



A. Agrimony (Agrintonia eupatoria). 



B. Wild Carrot (Daucits carota). 



C. Goosegrass (Galium aparine). 



D. Corn Buttercup (Ranunculus arvensis). 



seeds have all been collected from human clothing * and give a 

 good idea of the diversity of species that may thus be spread. 

 Avens (Geum urbanum), buttercup (Ranunculus bulbosus and 

 R. acris\ cocksfoot, couch grass, dandelion (Taraxacum vul- 

 gare), dock (Rumex sanguineus), enchanter's nightshade 



1 I am indebted to the Rev. E. A. Woodruffe Peacock for the loan of tubes 

 containing seeds, etc., collected from human clothing. The above list is drawn 

 up from the identifications thus obtained, 



