Bracken leaves. Coloured scanning electron micrograph (SEM) of the leaves of a bracken plant (Pteridium aquilinum). The undersides of the leaves are c

---

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.

---

Size: 3817px × 3100px
Photo credit: © SUSUMU NISHINAGA/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: aquilinum, botany, bracken, coloured, fern, ferns, leaf, leaves, multiple, nature, plant, pteridium, pteridophyte, pteridophytes, reproduction, reproductive, sac, sacs, sem, sporangia, sporangium, spore, spore-bearing, spores, underside, undersides