1907.] 



Studies of Weeds. 



737 



extends to very considerable depths. I have several times 

 traced it vertically downwards in stiff clay three or four feet 

 (Fig. 2). 



Coltsfoot is commonly confined to stiff, damp soils, and more 



Fig. 2. — Leaves AND Rhizome of Coltsfoot (on the left). 

 Coltsfoot Plant just after " Seeding " (on the right). 



especially to those containing lime or marl, although it is some- 

 times met with where lime is not abundant.- 



Methods to be Adopted in Getting Rid of Coltsfoot, — i. Very 

 frequently no attempt is made to get rid of this pest until its 



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