5 27 
Species 6 . Heart-leaved Tacamahaca Poplar Tree . (Populus Candicans.) 
T^his also is native of Canada, and is resinous like the preceding; but the leaves are different, 
being hollowed next the petiole and drawn out at the point. It flowers earlier, namely in March. 
Introduced about 1772, by John Hope, M. D.* 
Species . Smooth Poplar Tree. (Populus Ljevigata.) 
Native of North America. Cultivated in 1769, by Hugh Duke of Northumberland. It flowers 
in March and April. 
t 
Species 8. Canadian Poplar Tree. (Populus Monilifera.) 
Native of Canada; introduced about 1772 by John Hope. M. D. It flowers in May. J* 
Species 9 . Athenian Poplar Tree. (Populus Gr^sca.) 
This resembles the next species in growth and foliage.—Native of the islands of the Archipelago. 
Cultivated in 1779, by Hugh Duke of Northumberland. It flowers in March and April. 
Species 10 . Various-leaved Poplar Tree . (Populus Heterophylla.) 
A large tree; branches numerous, veined and angular; leaves broad and slightly serrate: flowers 
in" loose aments, making little show.—Native of Virginia and New York. Cultivated in 1765 by 
John Fothergill, M. D. It flowers in April and May.:]: 
Species 11. Carolina Poplar Tree. (Populus Angulata.) 
Shoots very strong, and is covered with a light green bark like some sorts of Willow. The leaves 
upon young trees, and also upon the lower shoots are very large; but those upon older trees are 
smaller: as the trees advance their bark becomes of a lighter colour, approaching to grey. The 
aments are like those of the Black Poplar; and the anthers are purple. It grows naturally in Caro¬ 
lina, where it becomes a very large tree. I have seen some of a very considerable size in England. 
It was cultivated by Mr. Miller in 1759; and flowers in March.:]: 
CULTURE. 
These trees may be propagated either by layers or cuttings, which will readily take root, as also 
from suckers, which the white Poplars send up from their roots in great plenty; but these are less 
valuable than those propagated by cuttings, being more liable to send up suckers. The best time 
for transplanting these suckers is in October, when their leaves begin to decay. These may be placed 
in a nursery for two or three years to get strength, before they are planted out where they are 
designed to remain; but if you intend to propagate them from cuttings, it is better to defer the doing 
of that until February, at which time you may plant truncheons of two or three feet long, thrusting 
* Hort. Kew. 
•f- Idem. 
:]: Idem, 
