Light micrograph of a seed grain of silver birch, betula pendula. The brownish seed grain has two little wings to carry the seed by wind. The typical catkins of birch contain hundreds of seeds. Microscopic contrast technique : Darkfield lighting. Magnification 30x when printed 10 centimetres wide. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Guenther, Gerd |
Taille de l’image : | 4776 px × 3744 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |