KEY FOR THE IDENTIFICATION OF TREES AND SHRUBS 55 



65. Leaves |— 1 inch long, flattened, 2 

 silvery stripes beneath, sessile on 

 the twigs leaving merely circular scars 

 on smooth twigs after the fall of the 



leaves Genus Abies 64 



64. Leaves about 1 inch long, dark 

 green above, silvery beneath, 



aromatic Balsam Fir 



Abies balsamea (L. ) Mill. 

 64. Leaves 1 inch long, bluish green, 

 Irregularly arranged on the twig, 

 curving upward, buds resinous. 



White Fir 



Abies irandls Lindl. 

 63. Leaves about 1 inch long, stiff, 

 pointed, set singly all round the 

 twig on short, slender petioles which 

 are persistent after the leaf falls, 

 making a rough bark. 



Genus Ptcea. . . « . . 65 

 65. Leaf blue-green with a whitened 

 surface, tip l.icurved. 



Blue Spruce 



Picea tlauca (Moench. ) Voss. 

 65. Leaf light-green, somewhat ill- 

 smelling White Spruce 



Picea canadensis (Mill.) BSP. 

 65. Leaf J-% inch long, dark green, 

 shining, spirally crowded on the 

 branches .... Norway Spruce 



Picea Abies (L. ) Karst. 

 66. Branches cylindrical, scales similar, 

 set opposite each other close against 

 the branch. Awl-shaped needles of the 

 juvenile type may occur on the same 

 tree. See #63 . . .Red Cedar 



Juniperus vlrglniana L. 

 66. Branches flat, scales of two types: 

 two broad scales set opposite each 

 other close against the twig; two 

 narrower scales set opposite each 

 other on the two edges of the twig, 

 making the foliage appear as if 



pressed Arbor Vitae 



Thuja occldentalls L. 



