View of the underside of a leaf of the "male fern",Dryopteris filix-mas,showing the spore- bearing structures known as sori. The spores are contained within the small,black sporangia (spore sacs) which protrude from under the brown,kidney- shaped protective membranes. Many of the sori are coated with a pale grey fungus | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Read, Dr. Morley |
Taille de l’image : | 3358 px × 5039 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |