The common alder (
Alnus glutinosa
) grows with a bushy shape, with several stalks arising from the same base. Its
leaves are dark green and hearth-shaped; at first sight, they resemble those of
the hazel, although the latter are tenderer and paler in color. This tree
prefers humid ground; so it is found in woods mainly in association with
willows and poplars. Its fruits are sort of woodlike berries in close clusters.
Other common varieties are the green alder, the gray alder and, in Italy, the
Italian or Napolitan alder.
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