434 



BORAGINACEJE. 



SYMPHYTUM OFFICINAL^: (Common Comfrey). 



of white, pink, or purple drooping flowers. Often 

 introduced into gardens, from which it is very difficult 

 to eradicate it when it has once established itself, owing 

 to the brittleness of its fleshy roots, the least bit of 

 which will grow. Fl. May August. Perennial. 



* S. tuberosum (Tuberous Comfrey) is a more slen- 

 der plant than the preceding, and is very rare, except 

 in Scotland ; the stem is scarcely branched, and but 

 slightly winged. 



