Catkins on a Silver Birch (Betula pendula). The large,male catkins are hanging below the branch,while the small,female catkins are on top. Catkins consist of many tiny petal-less flowers clustered around an axial stem. The male catkins release millions of pollen grains,which are carried on the wind to pollinate the female catkins | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Shaw, Duncan |
Taille de l’image : | 3458 px × 5180 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |