CoTUributions to Canadian Botany. 9 



-Ehamnus Purshiaxa, DC. 



In woods at Revelstoke, Columbia Kiver, B.C. {John 

 Macoun.) Eastern limit. 



Acer saccharum, Marshall. 



A. saccharinum, Wsing.,MsiGO\in Cat. Can. Plants, VoL I, 

 p. 99 in part. 



A. saccharinum, Wang., var. nigrum, T. & G. ; Maconn 

 Cat. Can. Plants, VoL 1., p. 99. 



Bark gray ; internodes mostly slender and elongated, 

 commonly glossy and reddish.; buds gray, conical, slender 

 and acute ; petioles, little dilated at base, not concealing 

 the mature buds, without stipules ; leases, thin, typicallj 

 large (usually 4 to 7 inches broad). Hat, dull, usually light 

 green above, the lower surface grayish, glabrous to pubes- 

 cent, or exceptionally quite hirsute when young, isodiame- ' 

 trie, truncate at base to sUghtly cordate with an open 

 sinus, or broadly cuneate, rather deeply o-lobed, except for 

 some smaller 3-lobed leaves near the ends of the branches, 

 with typically narrow sinuses, the three larger lobes with 

 parallel sides or dilated upwardly and each with a 

 slender apical acumination often sinuously bidentate on 

 the sides, and two similar lateral acuminations, or the 

 lateral lobes merely sinuate on the upper margin, the 

 smaller outermost lobes mostly sinuously 1 to 2 toothed 

 on the lower margin; fruit, large (6 to 10 mm.), the outer 

 lines of the large wings (8 to 12 x 16 to 28 mm.), nearly 

 parallel or spreading to something less than a right angle. 



From Nova Scotia to Lake Superior. 



Acer saccharum, var. barbatum (Michx.), Trelease. 



A. saccharinum, Wang. ; Macoun, Cat. Can. Plants, V(A 

 I., p. 99, in part. 



Bark, gray to almost black; internodes often shorter 

 and stouter, commonly dull but reddish ; buds gray, 

 pubescent or dark, conical ovoid, often obtuse ; petioles asf 



