Fern spore cases. Coloured scanning electron micrograph (SEM) of a sorus on the underside of a fern leaf. A sorus is a group of sporangia (brown) covered by an umbrella-shaped covering known as an indusium (pink). The sporangia contain spores,the reproductive units of the fern | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gschmeissner, Steve |
Taille de l’image : | 4475 px × 3933 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |