Contrihutions to Canadian Botany. 9 



iJlIAMMS PUHSIllAXA, DC. 



Ill woods at Kevelstoke, Coliuubia Kiver, li.C. {John 

 Macoun.) Eastern limit. 



Acer saccharum, Maisliall. 



A. saci'harinum, Wang., Macoun Cat. Can. Plants, Vol. I, 

 p. 99 in part. 



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

 Cat. Can. Plants, Vol. T., i.. 99. 



Bark gray ; internodes mostly slender and elongated, 

 commonly glossy and reddish.: Luds gray, conical, slender 

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

 the mature buds, without sti})ules ; leaves, thin, typically 

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

 green al)ove, the lower surface grayish, glalirous to pubes- 

 cent, or exceptionally (piite hirsute when young, isodiame- 

 tric, truncate at base to slightly cordate with an open 

 sinus, or broadly cuneate, rather deeply 5-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 l)identate on 

 the sides, and two similar lateral acuminations, or the 

 lateral h^ljes 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 nmi.), nearly 

 parallel or .spreading to something less than a right angle. 



From Nova Scotia to Lake Superior. 



Acer saccharu.m, var. barbatum (Michx.), Trelease. 



A. saccharinum, Wang. ; ]\Iacoun, Cat. Can. Plants, Vol 

 I., p. 99, in part. 



Bark, gray to almost black: internodes often shorter 

 and stouter, commonly (hill but reddish; l)uds gray, 

 pu])escent or dark, conical ovoid, often ol)tuse; petioles as 



