/& Leaves 5-15 cm, long or ~ore, egg-shaped or triangular, 
ZOoval or eiliptica? in outline 
(8 Leaf-stalks 2.5-10 cme long, commonly 5-8 cm, and 
3 
LiLveiny beneath Populus (p. ee 
IB Leaf-stalks seldom 2.0 cm, long, usually 6-12 mm, 
24% often nearly wenting 
. y 
YK Laser aie ce? Cae? a 
20 Ga.Leaves distinctly egg-shaped, widest below the 
R middle, margins toothed; leaf-stalks averaging 
AXabout 12 Mme , 
22 Lateral veins 2, arising near the base of the 4 
2(,leef, three veins-thus prominent Ceanothus (pe. | 
2,2, Lateral veins several, arising from the midvein 
24 Leaves soft-hairy beneath 
2, (,Leaves 3-6 cm. long, wedge-shaped or 
Oo subtruncate at the base, obtuse at | 
3 the apex Holodiscus (pe 
1, Leaves €-8 cm. long, abruptly acuminate at 
30 the anex, subcordate and rounded at the 
SSoce Corylus (pe 
LA Leaves smooth or lightly hairy, chiefly on the 
Ss 
A20veins beneath 
2L Bark bronze-color to chalky white, outer bark 
2 peeling easily; leaves abruptly and sharply 
pointed at the tin Betula (p. 
2 Bark grey, dull, whole bark peeling together; 
%oleeves rether bluntly pointed Alnus (pe 
20Gb Leaves oval or ellipticals leaf-stalks 12 mm. long 
24 or less 
2ZLeaves rether coarsely and shsrply toothed in the 
upper two-thirds, the lower third of the margin 
‘Ie < smooth Spiraca (pe 
QzLeaves Sincly toothed througnout or nearly smooth 
gAlLeaves 2-7 cu. long, leat-stalks 4m, or less 
2bLesves broadest above the midcle; thinly hairy 
30beneath Menziesia (p. 
QlLeaves troadest necr or below the midcles 
3onot hairy Vacciniun (p. 
Leeves 8=15 cn, long, leci-stalks about 6-12 rm, 
Oo? 
AlpBark very bitte: .ste ¢ 
zovellow inside when pecled Rhammus (pe ): 
p bee caditg ee ane oe ee 
4(, Bark morc or Iess bit: 
€ 
a | x oe 
u 
= 
but with « cistinct 
flavor o. peseh si isually ressmbling 
3Zof cherry bark externa not yéllovish 
insid« vhen pocled Prusus (pe ) 
——---— = 
