CHECK LIST OF FOREST TREES 67 



Populus texana Sargent. Cottonwood. 



Range. — Northwestern Texas (on the Canadian River, near Canadian, Hemp- 

 hill County; near Amarillo; Palo-duro Canyon, Randall County; near Post, 

 Garza County; near Sweetwater, Nolan Count}' — Sargent.). 



NAME IN USE 



Cottonwood 



Populns wislizenii (Watson) Sargent. Cottonwood. 



Range. — Western Texas and New Mexico (valley of the Rio Grande) and 

 adjacent sections of Mexico, extending also (along streams) into western Colo- 

 rado (Mesa County), and possibly into southeastern Utah. 



Note ox nomenclature. — Originally described as Populus Fremontii var., 

 Wislizenii S. Watson, and later considered a form of Populus Fremontii S. Watson. 



NAMES IN USE 



Wislizenus Cottonwood. Cottonwood. 



*Populus macdougalii Rose. MacDougal Cottonwood. 



Range. — Southeastern California and southwestern Arizona (on both sides of 

 the Colorado River in the vicinity of Yuma, in dense pure stands; reported also 

 from southeastern Arizona in all the ten divisions of the Coronado National 

 Forest — fide Thornber). Frequently planted for shade in Yuma and other 

 desert towns and stations along the Southern Pacific Railroad. 



NAME IN USE 



MacDougal Cottonwood 

 Populns alba Linnaeus. White Poplar. 



Range. — Europe and Asia. Widely naturalized in Canada and the United 

 States by cultivation from New Brunswick and Ontario to Virginia and Mary- 

 land. 



NAMES IN USE 



White Poplar. Aspen. 



Silver-leaved Poplar. White Aspen. 



Abele. Great Aspen. 



Abele-tree. Rattler-tree. 



White-leaf. White-bark. 



VARIETIES DISTINGUISHED IN CULTIVATION 



Populus alba nivea (Willdenow) Loudon. Snowy Poplar. 



Populus alba canescens (Smith) Loudon. Silver Poplar. 



Populus alba canescens umbraculifera Sudworth. Weeping Silver Poplar. 



Populus alba bolleana Louche. Bolle Poplar. 



Populus alba nutans Sudworth. Weeping White Poplar. 



Populus alba globosa Dippel. Roundtop Poplar. 



Populus nigra Linnseus.* Black Poplar. 



Range. — Europe. Naturalized in several localities in the East (valleys of the 

 Hudson and Delaware Rivers). 



NAMES IN USE 



Black Poplar. Mormon Tree. 



Willow Poplar. Devil's Fingers. 



Catfoots Poplar. Old English Poplar. 



