2 2 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



and leaves, and is the latest of all the poplars in unfolding its 

 leaves, which in the young state have a fine bronzy tint. The 

 parents, judging from the botanical characters and the late open- 

 ing of the foliage, were evidently P. nigra typica and P. deltoidea 

 nionilifera. The latter had been introduced into France from 

 Canada, where it is wild in the valley of the St Lawrence. The 

 black Italian poplar has a characteristic habit and can be 

 readily distinguished, even a mile off, by its ascending branches 

 and wide head, as is well shown in Fig. 5, which represents a 

 tree at Belton, near Grantham, about 125 feet in height and 

 15 feet in girth at 5 feet from the ground. Mr A. B.Jackson 

 records one at Albury as 150 feet in height. The remarkable 

 fast growth of this valuable poplar is evidenced by a tree, exactly 

 100 years old, which was felled at Cassio Bridge, near Watford, 

 in 1907. It was 130 feet in height, and 16 ft. 11 ins. round the 

 trunk at 5 feet up, the contents of the butt being 701 cubic feet, 

 and of the timber of the whole tree about 1000 cubic feet. 



3. Populus regenerata, Schneider. This is a female tree, 

 exactly resembling the black Italian poplar in twigs and 

 leaves, but the latter open at least a fortnight earlier. In habit 

 this is narrower in outline (see Fig. 6). Most of the so-called 

 eucalyptus poplars are really this hybrid, which appears to have 

 been picked up as a seedling in a nursery near Paris in 18 14. In 

 France it is now more common and grows faster than P. ictotina, 

 and at Pontvallain has attained, in 22 years from the planting of 

 the set, no feet in height and 6 ft. to 6 ft. 10 ins. in girth. At 

 Culford, Suffolk, a plantation of these trees, 14 years old, 

 averaged 55 feet in height in 1913. 



4. Populus Eugenei, Simon-Louis. This is a male tree, with 

 twigs and leaves similar to those of P. serotina, but the leaves 

 are smaller and open earlier, and in habit it is distinctly narrower 

 than the black Italian poplar. It was found in 1832 as a chance 

 seedling in a bed of silver firs in the nursery of Simon-Louis, 

 near Metz. The only female poplar then existing in this nursery 

 was P. regenerata, which was very probably fertilised by the 

 pollen of a Lombardy poplar near by, these two poplars being 

 evidently the parents of this remarkable hybrid. The original 

 tree is, in my opinion, the most wonderful tree in Europe in 

 point of vigour, as it measured in 1913, when 81 years old, 

 no less than 150 feet in height and 25 feet in girth at 5 feet 

 above the ground, and appears to be still growing rapidly. 



