BLACK ITALIAN, OR NECKLACE-BEARING POPLAR. 



203 



of nine hundred feet, and yet tins enormous vegetable pro- 

 duction cannot be much above sixty years old. At Twizell, 

 planted in light free loam about twenty-two years ago, it 

 is upwards of sixty feet high, with a straight continuous 

 trunk, and measures in girth, at two feet from the ground, 

 five feet five inches : others of a younger age show an equal 

 rapidity of growth. 



It is easily propagated by cuttings made of the young- 

 wood, which ought to be planted during winter or early 

 spring. We commonly keep them in the nursery for 

 a year or two, by which time they become well rooted 

 and attain a height of five or six feet, and never fail to 

 succeed when transferred to their permanent stations. 



