CHECK LIST OF FOREST TREES 65 



VARIETIES DISTINGUISHED IX CULTIVATION 



Populiis deltoides aurea (Nicholson) Sudworth. Goldenleaf Cottonwood. 



Populus deltoides erecta (Selys) Sudworth. 



Populus deltoides crispa (Dippel) Sudworth. Curly-leaf Cottonwood. 



*Populus deltoides virginiana (Castiglioni) Sudworth. 40 



Southern Cottonwood. 



Range. — From Quebec and Lake Champlain southward through western New 

 England to Florida (Apalachicola River); westward to southern Minnesota, 

 the Dakotas, eastern Nebraska and Kansas, Oklahoma (lower Big Creek) and 

 Texas (Brown County). 



Note on nomenclature. — Formerly included under Populus deltoides Mar- 

 shall, in so far as its Southern range is concerned. 



NAMES IN USE 



Cottonwood (N. H., Vt., Mass., R. I., Carolina Poplar (Pa., Ind., Ohio). 



N. Y., Pa., Md., Miss., N. J., W. Va., Vermont Poplar (Vt.). 



Ky., Mo., 111., Wis., Kans., Nebr., Whitewood (Iowa). 



Iowa, Minn., Mich., Ohio, Ontario, Aspen Cottonwood (N. C). 



N. Dak., S. Dak. (trade). Necklace Poplar. 



Big Cottonwood (Nebr.). Water Poplar. 



Yellow Cottonwood (Ark., Iowa, River Poplar. 



Nebr.). Southern Cottonwood (lit.). 

 Cotton-tree (N. Y.). 



Populus deltoides pilosa (Sargent) Sudworth. 



Range. — Within the range of the preceding variety east of the Ohio Valley. 



X Populus eugenei Hort. ex Dode. 41 Carolina Poplar (Hybrid). 



Range. — Known only as a street tree more or less extensively planted in eastern 

 United States. The extent to which this hybrid has been planted here is 

 unknown. 



Note on nomenclature. — Believed to be a hybrid between Populus deltoides 

 Marshall and Populus nigra italica Du Roi, only the male form of the tree being 

 known. Designated bv some authors as Populus canadensis var. Eugenei 

 Schelle. 



NAMES IN USE 



Carolina Poplar. "Norway Poplar." 



Sudden Sawlog. 



*Populus sargentii Dode. Cottonwood. 



Range. — Foothills region east of the Rocky Mountains from the Saskatchewan 

 to New Mexico and eastward to the Dakotas, Nebraska, western Kansas (Raw- 

 lins County), Oklahoma, and into western Texas. 



Note on nomenclature. — Long supposed to be a western form only of the 

 eastern Cottonwood {Populus deltoides Marshall), it was in the meantime recog- 

 nized by several authors as varietally or specifically different from the latter 

 species, and has been variously designated as Populus angulata Porter and Coulter 



w Populus angulata Aiton (1789), on which Populus deltoides var. angulata Sargent was based (Trees 

 and Shrubs, II, 212, 1913), is older, but certainty of its application to our southern Cottonwood can not be 

 established. 



Populus deltoides pilosa (Sargent)^Sud worth differs from Populus deltoides virginiana (Castiglioni) Sud- 

 worth in having soft hairs on the midrib and larger veins. 



"According to C. S. Sargent (Trees and Shrubs, II, 212, 1913) the type of this hybrid sprang up many 

 years ago in the nurseries of Simon-Louis Freres at Plantieres near Metz, in Alsace. It is not assumed", 

 however, that all of the trees of this hybrid now in cultivation were derived from the type tree. Doubtless 

 many other trees of the same parentage were produced and propagated elsewhere. Some 30 years ago the 

 writer obtained cuttings from C. S. Harrison, Falling Water, Nebr., of a poplar which he was distributing 

 as the "Sudden Sawlog." The characteristics of this tree, which Mr. Harrison obtained from Europe, 

 appear to be those of X Populus eugenei. It is also known as " Norway Poplar." 



