SALICACE^E 



137 



Distribution. Banks of streams, often forming extensive open groves, and toward the 

 western limits of its range occasionally in upland ravines and on bluffs; Province of Quebec 

 and the shores of Lake Champlain, through western New England, western New York, 

 Pennsylvania west of the Allegheny Mountains, and westward to southern Minnesota, 

 North and South Dakota, eastern Nebraska, eastern Kansas, Oklahoma and Texas, and 

 southward through the Atlantic states from Delaware to western Florida, and through the 

 Gulf states to western Texas (Brown County). In the south Atlantic states and the valley 

 of the Lower Ohio River and southward sometimes replaced by a variety with leaves covered 

 above when they unfold with soft white hairs and below with close pubescence more or less 

 persistent during the season especially on the midribs and veins (var. pUosa Sarg.). 



Fig. 131 



Often planted for shelter and ornament on the treeless plains and prairies between the 

 Mississippi River and the Rocky Mountains, and as an ornamental tree in the eastern 

 United States and largely in western and northern Europe. 



X Populus canadensis Moench, believed to be a hybrid between the northern glabrous 

 form of P. balsamifera and the European P. nigra L., with several varieties, is cultivated in 

 Europe and occasionally in the United States. The best known of these varieties, X P. cana- 

 densis var. Eugenie Schelle, the Carolina Poplar of American nurseries, believed to be a 

 hybrid of the northern Cottonwood with the Lombardy Poplar, has been planted in the 

 United States in immense numbers. 



X Populus Jackii Sarg., believed to be a hybrid of the northern Cottonwood with P. 

 tacamahacca, with characters intermediate between those of its supposed parents, grows 

 spontaneously near the mouth of the Chateaugay River and at Beauharnois, Province of 

 Quebec, and at South Haven, Michigan, and is now occasionally cultivated. 



15. Populus Palmeri Sarg. 



Leaves thin, ovate, gradually or abruptly contracted at apex into a narrow acuminate 

 entire point, cutieate or rounded at the broad base, finely serrate with incurved teeth, ciliate 

 on the margins when they unfold, otherwise glabrous, 2'-5' long and l%'-2\' wide; petioles 

 slender, glabrous, l|'-2' in length. Flowers not seen. Fruit: aments glabrous, 12-15cm. 

 long; fruit ovoid, obtuse, slightly pitted, puberulous, thin-walled, 4-valved, '-' long, the 

 disk deeply lobed; pedicel slender, \'-\' in length. 



A tree 60 tall, with a straight trunk 3 in diameter, erect smooth pale branches forming 

 an open pyramidal head, the lower branches smaller, horizontal or pendulous, and slender 

 glabrous branchlets light reddish brown early in the season, becoming pale grayish brown 



