1830 The Trees of Great Britain and Ireland 



filaments ; disc small, glabrous, oblique ; stamens about twenty, with white 

 filaments. 



P. robusta is readily distinguished from most of the other hybrid poplars by 

 the minute pubescence on the branchlets and petioles. It is said to have been raised 

 about 1895 at Metz from seed of a female P. angulata, supposed to have been ferti- 

 lised by the pollen of the large tree of P. Eugenei which grows near it; but this is 

 improbable, as the branchlets of the latter tree, as well as those of P. angulata, are 

 quite glabrous. In all probability the male parent was the common pubescent 

 P. nigra, from which P. plantierensis, its fastigiate variety, was also derived at Metz. 



(A. H.) 



I saw in the nursery at Metz a large bed of plants from cuttings put in in 1909, 

 which were 10 to 12 ft. high in 1910, and was told that its stem is straighter and 

 more erect than that of the peuplier re'ge'ne're'. The extraordinary vigour of the young 

 trees justifies M. Jouin in believing that it will, in warm districts at least, surpass 

 P. Eugenei in size. Whether it will succeed in England remains to be proved ; but 

 it has been largely planted for several years by Baron Ahere in Belgium, and in 

 low damp ground near Metz, which is specially liable to spring frost. I have now 

 had it planted for two years in the same situation in which I grow P. serotina at 

 Colesborne. It seems perfectly hardy, but has not yet had time to show whether 

 it is superior in vigour to P. Eugenei or P. serotina. A tree planted at Glasnevin 

 in 1900 measured 42 ft. by 1 ft. 1 in. in April 1913. It is very narrow, almost 

 columnar in habit, with short ascending branches. (H. J. E.) 



POPULUS LLOYDII 



Populus Lloydii, A. Henry {hybrida nova). 



A tall tree of hybrid origin, with bark similar to that of P. serotina. Young 

 branchlets slender, covered with a minute erect pubescence ; glabrous and yellowish 

 brown in the second year. Buds small, brownish, viscid. Leaves (Plate 409, Fig. 21) 

 about 2\ in. wide and long ; truncate, rounded, or cuneate at the base ; tapering 

 above into a short non-serrated acuminate or cuspidate apex ; margin with crenate 

 serrations, ending in incurved points, ciliate till late in summer ; glands at the base 

 minute, variable, often absent ; petiole reddish, with a scattered minute erect 

 pubescence. 



Pistillate catkins, 2 to 2 J in. long ; axis glabrous ; pedicels short, glabrous ; 

 ovary globose, glabrous, in an oblique cup-shaped entire glabrous disc, crowned by 

 two, rarely three, widely dilated spreading yellow stigmas. Fruiting catkins, about 

 4 in. long ; capsules two-valved. 



This remarkable hybrid, of which the parents are probably the common English 

 black poplar (P. nigra betulifolia) and P. serotina, resembles the former in the 

 pubescent branchlets and petioles, and the latter in the shape, ciliation, and glands 

 of the leaves, which are bronze-coloured when opening. The leaves, being borne on 

 old trees, are probably smaller than normal ; and this tree, which is pistillate, is 



