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45
158
Young shoots hairless
and sticky. Leaves
with hairs only near
the main veins beneath
Alnus glutinosa (L.)
Gaertn.
158
Young shoots finely
hairy and not sticky.
Leaves evenly hairy
beneath
Alnus incana (L.)
Moench
159
Petals greenish, fused
at base. Flowers <8
mm across. Wood
foul-smelling
160
159
Petals not greenish,
free. Flowers >8 mm
across. Wood not foul-
smeling
161
160
Stems creeping.
Leaves with 4-11 pairs
of arched lateral veins.
Flower-stalks 10-15
mm
Rhamnus pumila
Turra
160
Stems erect. Leaves
with 9-18 pairs of
more or less straight
lateral veins. Flower-
stalks 2-4 mm
Rhamnus alpina L.
161
Leaves toothed only in
the upper part. Fruit
dry
Spiraea
chamaedryfolia L.
161
Leaves toothed all
162