BROAD-LEAVED MAPLE 



No. 48. VINE MAPLE. Acer circinnatum. 



Pursh. 

 PLATE IV. FIG. 34. 



Natural Order. Sapindaceae. 



Synonym. A. virgatum, Rafin. 



Source of Supply. British Columbia and the United States. 



Physical Characters, etc. Recorded dry- weight 41! Ibs. per 

 cu. ft. Hardness Grade 4, compare Hard Maple. Taste or 

 smell none. Burns well and quietly with little aroma, embers 

 glow in still air, heat expels a copious red juice. Solution 

 colourless. 



Grain. Fine and very compact. Surface moderately 

 lustrous. 



Bark. Brown, wrinkled externally : J-f inch thick, of one 

 layer finely laminated, and full of hard white bodies. A doubt- 

 ful timber tree. " Small and crooked " (2). " Not strong " (100). 



Authorities. Macoun (66), p. 98. Anderson (2), p. 13. 

 Sargent (100), p. 47. Hough (49), pt. IX., p. 21. 



Colour. White to brownish-white with yellow silver-grain. 



Anatomical Characters. As those of A. macrophyllum, but 

 the pores are smaller (size 4-5) and fewer (about 10-25 P er sq- 

 mm.) 



Type specimens authenticated by Hough. 



No. 49. BROAD-LEAVED MAPLE. Acer macro- 

 phyllum. Pursh. 



PLATE IV. FIG. 34. 



Natural Order. Sapindaceae. 



Alternative Names. Oregon Maple, Big-leaved Maple (49), 

 Californian Maple (12). 



Sources of Supply. Canada and the United States of America. 



Physical Characters, etc. Recorded dry- weight 40^ Ibs. per cu. ft. 

 (49), Hardness Grade 6, compare Chestnut. Taste or smell none. 

 Burns well and quietly with little aroma, embers glow in still air, 

 heat expels a copious red juice. Solution colourless. 



Grain. Fine, dense, even and compact, though open. Sur- 

 face lustrous. 



Bark. " Brownish-grey, becoming fissured longitudinally with 

 age and rough with friable scales, very much resembling the 

 bark of A. rubrum " (49). Of two layers, each about J inch thick, 

 both finely laminated : the inner fibrous, the outer hard and 

 leathery. 



Uses, etc. " Grows to a large size on Vancouver Island : a 

 magnificent tree " (66). " The most valuable of the deciduous trees 



57 



