POPULUS 211 



truncate at the base), with short or slender points ; 4 to 7 ins. long, 3 to 5 ins. 

 wide ; the cartilaginous margins regularly set with comparatively small, 

 rounded, incurved, gland-tipped teeth, and minutely hairy ; both surfaces 

 smooth, except when just unfolding, and glossy green ; there are one or two 

 pairs of glands at the base of the leaf on the upper side ; stalk smooth, 

 flattened. Female catkins 2 to 4 ins. long ; flower-scales not fringed, but 

 only slightly lobed at the margins ; stigmas three or four. 



Var CORDATA. Messrs Simon-Louis have in their nursery at Plantieres, 

 near Metz, a fine form of P. angulata which they call var. cordata. Mr Jouin 

 informs me that it is hardier than the type. It produces very fine foliage ; 

 many of its heart-shaped leaves being 6 or 8 ins. long, and 5 or 6 ins. wide. 

 Crossed with P. Eugenei, this variety has produced a very vigorous hybrid 

 P. ROBUSTA, C. K. Schneider (known in nurseries as " P. angulata cordata 

 robusta 3; ). 



P. angulata is believed to be a native of the south-eastern United States, 

 but if really wild there, its whereabouts do not appear at present to be known. 

 It has been cultivated in England since early in the eighteenth century. It 

 is allied to P. monilifera, but is a more striking tree, especially in its foliage, 

 differing from that species in its angled or ribbed young shoots, and its larger, 

 but comparatively narrower, smaller-toothed leaves and shallowly lobed 

 (not fringed or laciniated) catkin scales. There is a male tree in the Syon 

 Gardens 1 1 1 ft. high. 



P. ANGUSTIFOLIA, James. WILLOW-LEAVED POPLAR. 



(P. balsamifera var. angustifolia, S. Watson.") 



A tree 50 to 60 ft. high in a wild state (Sargent), but, as seen in cultivation 

 here at present, a low bushy-headed tree with short, much-forked, crooked 

 branches ; young shoots round, smooth or minutely downy, especially towards 

 the apex ; winter buds sticky, slender-pointed. Leaves lanceolate or ovate- 

 lanceolate ; 2 to 5 ins. long, ^ to ij ins. wide ; wedge-shaped at the base, 

 tapering gradually to a point at the apex, minutely and evenly round-toothed, 

 green on both sides, although paler beneath, smooth except sometimes for 

 minute down beneath ; stalk ordinarily about | in. long. Catkins not seen 

 in this country, but the male ones described by Sargent as ij to 2^- ins. long, 

 densely flowered ; the female catkins are 2 to 4 ins. long when mature. 



Native of Western N. America, but not of the Pacific side of the Rocky 

 Mountains. It is one of the balsam group with the characteristic odour, and 

 is distinguished by its willow-like leaves, not white beneath. In foliage it 

 most resembles P. laurifolia, but that species has angular, more downy young 

 shoots, and leaves pale beneath. 



P. BALSAMIFERA, Linnceus. BALSAM POPLAR. 



A tree TOO ft. high in a wild state, but rarely more than half as high in this 

 country, producing suckers freely ; young shoots smooth, round ; winter buds 

 thickly covered with a balsamic, very fragrant, viscid, yellowish resin, often 

 i in. long, long-pointed. Leaves broadly ovate, rounded or slightly heart- 

 shaped at the base, slender-pointed, very variable in size, round-toothed, 

 ordinarily 2 to 5 ins. long, I J to 3 ins. wide ; quite smooth and dark shining 

 green above, smooth or slightly downy beneath, the pale or whitish ground 

 conspicuously net-veined ; stalk to 2 ins. long. Male catkins 3 ins. long ; 

 female ones 4 or 5 ins. long. 



Native of N. America, where it is widely spread and abundant in the 

 northern altitudes. It was introduced sometime in the seventeenth century. The 



