302 FLORA HISTORTCA. 



than when sown in the full ground ; and when a 

 few of the plants are established on the walls, they 

 will shed their seeds, so that they will maintain them- 

 selves without any further care. I have observed 

 some plants of this kind, which have grown from the 

 joints of a wall, where there has not been the least 

 earth to support them, which have resisted the cold, 

 though they have been greatly exposed to the winds, 

 when most of those in the full ground were killed ; 

 so that these plants are very proper to cover the walls 

 of ruins, where they will have a very good effect." 



From this remark we were induced to scatter the 

 seeds of the Blue Neck-wort with those of the Wall- 

 flower on a broken wall, and on the second year 

 we had as happy a combination of flowers as could 

 be conceived from a mixture of blue and gold. 

 But we must observe that those plants which sprung 

 up just beneath the wall produced much larger 

 cymes of flowers than such as grew out of the cre- 

 vices of the stones ; therefore we recommend some 

 of these plants to be set in a good moist soil, so that 

 if they should decay after flowering, their beauty 

 would be seen to greater advantage during the sum- 

 mer, and other plants might replace them the fol- 

 lowing year. 



When seeds of the Trachelium cannot be pro- 

 cured, the plants may be increased by off*-se^s or 

 cuttings, which may be taken off almost at any 



