46 



Ximes in use. — River Cottonwood (R. I., Miss., La., Ohio) ; Swamp 

 Cottonwond (S. C, Miss., Del.): Black Cottonwood (Ala.); Cottonwood 

 (K Y., Ya., K C, S. C, Miss.): Downy Poplar (Tenn., Ala., Ark.); 

 Swamp Poplar (N. J.); Cotton-tree (N. C); Liar (La.); Langues de 

 femmes (La.). ■ , 



Populus balsamifera Linn. Balm of G-ilead. 



Range. — Coast of Alaska and valley of Mackenzie River (latitude 60°) to Hudson 

 Bay and Newfoundland; southward to northern New England and New York 

 (Taughannock Falls, Cayuga Lake), central Michigan and Minnesota. Dakota (Black 

 Hills), northwestern Nebraska, northern Montana, Idaho, Oregon, and Nevada. 



Names in use. — Balsam (N. H., IS". Y., Wis., Mich., Minn., Nebr., 

 Mont., Ohio, Ont.) ; Balm of Gilead (Me., N. H., Vt., Mass., R. I., Conn., 

 K. T., Mich., Nebr., Minn., K Dak., Ont.) ; Cottonwood (Idaho) ; Poplar 

 (Wis., Minn.); Balsam Poplar (N. H., Vt., Nebr., Minn.); Tacamahac 

 (Minn.) : Baumier (Quebec) ; Hough-barked Poplar (Hudson Bay region). 

 Populus balsamifera candicans (Ait.) Gray. 



Hairy Balm of G-ilead. 



Names in use. — Balm of Gilead (Me., N. H., Vt., Mass., 23". Dak., 

 Minn., Ont.) ; Balsam (Mich., Md.. and Va. Cult.). 



VARIETIES DISTINGUISHED IN CULTIVATION. 



Populus balsamifera intermedia Loud. 

 Populus balsamifera viminalis Loud. 

 Populus balsamifera latifolia (Mcench.) Loud. 



Populus acuminata Bydberg. Lanceleaf Cottonwood. 



Range. — South Dakota (Black Hills) and western Nebraska to the eastern base of 

 the Rocky Mountains of Colorado. Range insufficiently understood. 



Populus angustifolia James. Narrowleaf Cottonwood. 



Range. — From southwestern Assmiboia (Milk and Belly rivers) to Dakota (Black 

 Hills) and northwestern Nebraska; southward in the mountain regions to central 

 Nevada, New Mexico (Mogollon Mountains), central Arizona. 



Names in use. — Black Cottonwood (N. Mex.. Utah, Colo.); Narrow- 

 leaved Cottonwood (Colo., Utah) ; Narrow-leaved Poplar (Mont., Utah) ; 

 Balsam (Mont.); Cottonwood (Idaho, Colo.); Willow Cottonwood 

 (Idaho); Bitter Cottonwood (Idaho); Willow-leaved Cottonwood 

 (Mont.). 

 Populus trichocarpa Torr. & Gr. Black Cottonwood. . 



Range. — From southern Alaska through western British Columbia (east to Colum- 

 bia River), western Washington, Oregon, California (and islands) to the southern 

 slope of the San Bernardino Mountains. Northern range insufficiently understood. 



Names in use. — Black Cottonwood; Cottonwood (Oreg., Cal.); Bal 

 sam Cottonwood; Balm (Oreg.); Balm Cottonwood (Cal.). 



Populus deltoides Marsh. (Common) Cottonwood. 



Populus monilifera Ait. 



Range. — From Quebec (Lower Maurice River) and Vermont (Lake Champlain) 

 through western New England and New York, Pennsylvania (west of Alleghenies), 

 Maryland, and Atlantic States to western Florida and west to the Rocky Mountains 

 from southern Alberta to northern New Mexico. 



