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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Shaw, Duncan |
Bildgröße: | 3458 px × 5180 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |