Pollen corona / Alder (Alnus)


Season for alder-tree pollen:
Between end of February and mid of April
Picture
Alder corona shaken from a tree
Photograph © by Karl Kaiser, A-Schlägl, March 10, 1997

Description:

Alders bloom very early. Already by the end of February/beginning of March, one can look for alder coronae if there are alders nearby.

Pine tree (Pinus) | Hazel-tree (Corylus)
 
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