OF OKNAMENTAL TREES. 183 



somewhat inclined to throw up suckers in 

 dry soils. May be propagated as No. 1. 



The best Bartram specimen is seventy feet 

 high and four and a half feet in circumfer- 

 ence. 



4. P.CANAPENSiSjMc&ame. Young branches 

 angled. Leaves cordately ovate, tapering to 

 a point, finely and rather unequally toothed ; 

 petioles compressed; buds gummy. Cana- 

 dian poplar. Native of the Northern States. 



It frequently grows to eighty or ninety 

 feet high, and is well worthy of a place in 

 any collection. In soils similar to the last. 



5. P. CANDICANS, Aiton. Shoots round. 

 Buds very gummy. Leaves heart-shaped at 

 the base, ovate-acuminate ; petiole flattened 

 in the upper part, frequently hairy. Onta- 

 rio poplar ; balsam poplar of the Northern 

 States. 



It is in every way a larger and a finer 

 tree than the true balsam, and is readily dis- 

 tinguished by the leaves. 



6. P. CANESCENS, Smith. Leaves roundish, 

 very slightly lobed, toothed. Stigmas eight. 

 Gray poplar. Native of England. 



By many considered a variety of the abele. 



