Bracken leaves. Coloured scanning electron micrograph (SEM) of the leaves of a bracken plant (Pteridium aquilinum). The undersides of the leaves are covered in spore-containing sacs known as sporangia (brown). The spores are released when the wall of a sporangium dries and splits to throw the spores away from the plant | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nishinaga, Susumu |
Bildgröße: | 3817 px × 3100 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |