POPLAR. 265 
forms of this are known to horticulturists as P. Nolesti and P. 
IVobsky. 
Populus angustifolia. Narrowleaf Cottonwood. 
Leaves lanceolate or ovate-lanceolate, narrow at base, green 
on both sides; branches rather 
slender with smooth bark. Cat- 
kins densely flowered, one and 
one-half to two inches long; 
stamens twelve to twenty; pistil- 
late catkins lengthen as the fruit 
erows, and when the seeds are 
1ipe the catkins are from two and 
one-half to four inches long. Tree 
much smaller than the common 
Cottonwood, it seldom being 
more than fifty feet high and fil- 
teen inches in diameter, resem- 
bling a willow more than a pop- 
Figure 55. Leaves of Narrow- lar. 
leaf Cottonwood, one-third nat- : r : i: 
ural size. Distribution.—It is found along 
streams in Montana, Assiniboia, 
Black Hills of South Dakota and Northwestern Nebraska to Ari- 
zona. It is the common Poplar of Southern Montana, Eastern 
Idaho, Wyoming, Utah and Northern Colorado. 
Propagation.—By seeds and cuttings. 
Properties of 1V’ood.—Light, soft and weak; hght brown, with 
thin, nearly white, sapwood. Specific gravity, 0.3912; weight of 
a cubic foot, 24.38 pounds. 
Uses.—The Narrowleaf Cottonwood is used as a shade and 
street tree in towns of Colorado and Utah, for which purpose it 
does very well if provided with water, and soon forms a conical 
shapely head. It is hardy in Minnesota, but has been planted here 
but a few years. 
Populus deltoides. (7. monilifera.) Cottonwood. Car- 
olina Poplar. Yellow Cottonwood. 
Leaves large, deltoid or broadly ovate, usually abruptly acu- 
minate, coarsely crenate; petioles laterally compressed. Twigs 
