79 



medicine." Emerson. A tree in the writer's garden, fifty years old, 

 measured, Sept., 1878, 



Circumference 8 feet 1 inch, 1 foot from gi-ound. 



" 6 " 10 inches, 6 feet " " 



Height about 60 feet. 



The Red Horse-chestnut and perhaps one or two others are met 

 with in cultivation. 



Acer Pennsylvanicum, L. (Striped Maple.) In some towns 

 this shrub or tree is called Moose-wood, a name applied to Dirca 

 palustris and also to Viburnam lantanoides in other places. This is a 

 good illustration of the danger of using the common names of plants 

 when accuracy is desired, and the importance of a botanical name 

 which is accepted everywhere for a species. The Striped Maple is 

 often met with in Essex Woods, Rockport, Swampscott, Andover, 

 Georgetown, etc. The trunk occasionally reaches a diameter of six 

 inches, in specimens planted out, one of which may be seen in Har- 

 mony Grove Cemetery in Salem, another on the grounds of G. A. 

 Tapley, Esq., Danvers. The leaves sometimes are found to measure 

 8 by 10 inches. 



Acer sjncatum, Lam. (Mountain Maple.) Although at the "White 

 Mountains, and elsewhere, this species is found in company with the 

 Striped Maple, yet it has not been authentically reported within our 

 county limits. It is rarely seen even in cultivation, under which 

 treatment it makes a very pretty shrub. 



Acer saccharinum, Wang. (Sugar Maple. Rock Maple.) 

 Nearly all of the old and large specimens of this tree have been 

 destroyed, so that the native growth is chiefly suckers from the old 

 stumps. Trees of this species are occasionally seen with a trunk 

 eighteen inches in diameter. Planted out, the Sugar Maple is a most 

 beautiful shade tree, although rather dense for city streets. Little 

 or no sugar is made from the maple in this county, both on account 

 of the scarcity of large trees and the unfavorable conditions of the 

 climate. 



The variety nigrum {A. nigrum, Mich.) is seen now and then in 

 cultivation where it becomes a flue tree. 



Acer dasycarpum, Ehrhart. (White Maple. Silver Maple.) 

 This tree, common iu cultivation, grows naturally along the Ipswich 

 River and elsewhere in the northwestern part of the county, where 

 many fine specimens are found. One tree in Topsfield measured by 

 Mr. Sears and the writer, May, 1875, was eight feet in circumference 

 four feet from the ground. Many others of similar size are to be met 

 with. 



Acer rubrum, L. (Red Maple. Swamp Maple.) This species 



