No. 14.] FLOWERING PLANTS AND FERNS. 273 



A popular shade tree, very common in cultivation. Very 

 valuable for its wood, which is extensively used in cabinet 

 work, for floors and for fuel. " Bird's-eye Maple " is of this 

 species. It is also the source of genuine maple sugar. The 

 autumnal foliage is very brilliant. 

 Acer saccharum Marsh., var. nigrum (Michx. f.) Britton 



(black). 

 Acer saccliarinuin Wang., var. nigrum of Gray's Manual ed. 6. 

 Acer nigrum Michx. f. 

 Black Sugar Maple. 



Rare. Roadside as an escape from cultivation : Salisbury 

 (Mrs. C. S. Phelps). May. Adventive from the North or 

 West. 



Acer platanoides L. (like Platanus, the Plane Tree). 



Norway Maple. 



Rare. Escaped from cultivation to roadside thickets in 

 Hartford (H. S. Clark & Bissell). May. Adventive from 

 Europe. 



Frequent and well known in cultivation. 



Acer saccharinum L. (sugary). 

 • Acer dasycarpum Ehrh. 



White, Silver or Soft Maple. 



River banks and swamps. Frequent inland along the 

 larger streams; rare elsewhere. March — April, rarely 

 earlier. 



Often planted for shade or ornament. 



Acer rubrum L. (red). 



Red, Swamp or Soft Maple. 



Common. Swamps, low woods or sometimes in dry 

 ground. March — April. 



The wood is largely used in the manufacture of furniture 

 and wooden ware and for fuel. A beautiful tree at all seasons 

 and one of the most brilliant in spring and fall ; it is worthy 

 of much more extensive cultivation. The bark is -medicinal. 



Acer Negundo L. (an Indian name). 

 Negundo aceroides Moench. 

 Box Elder. Ash-leaved Maple. 



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