Phenological phases

Silver birch (Betula pendula Ehrh.)



Leaf appearance

Closed buds

birch_leaf_01 birch_leaf_02


The defined stage of leaf appearance

The buds have flushed and the green of the new leaves are clearly visible.

birch_leaf_03 birch_leaf_04


After the defined stages of leaf appearance

The new leaves are unfolded and the leaf blade is fully visible

birch_leaf_05 birch_leaf_06

Photos: Eija Matikainen



Flowering in silver birch

The flowers of male (staminate) inflorescence (hanging catkins) are open and begin to release yellow pollen.

(On windy days the release of pollen is visible).

birch_flowering_01

Photo: Teijo Nikkanen



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