146 TREES OF NEW ENGLAND. 



Fruit. Keys usually an inch or more in length, glabrous, 

 wings broad, mostly divergent, falling late in autumn. 



Horticultural Value. Hardy throughout New England. Its 

 long life, noble proportions, beautiful foliage, dense shade, 

 moderately rapid growth, usual freedom from disease or insect 

 disfigurement, and adaptability to almost any soil not saturated 

 with water make it a favorite in cultivation ; readily obtain- 

 able in nurseries, transplants easily, recovers its vigor quickly, 

 and has a nearly uniform habit of growth. 



Note. Not liable to be taken for any other native maple, 

 but sometimes confounded with the cultivated Norway maple, 

 Acer platanoides, from which it is easily distinguished by 

 the milky juice which exudes from the broken petiole of 

 the latter. 



The leaves of the Norway maple are thinner, bright green 

 and glabrous beneath, and its keys diverge in a straight line. 



PLATE LXXIII. ACER SACCHARUM. 



1. Winter buds. 



2. Flowering branch. 



3. Sterile flower. 



4. Fertile flower, part of perianth and stamens removed. 



5. Fruiting branch. 



Acer Saccharum, Marsh., var. nigrum, Britton. 



Acer nigrum, Michx. Acer saccharinum, var. nigrum, T. fy G. 

 Acer barbatum, var. nigrum, Sarg. 



RLACK MAPLE. 



Habitat and Range. Low, damp ground on which, in New 

 England at least, the sugar maple is rarely if ever seen, or 

 upon moist, rocky slopes. 



Apparently a common tree from Ottawa westward throughout 

 Ontario . 



The New England specimens, with the exception of those 

 from the Champlain valley, appear to be dubious intermediates 



