Search in gallery The leaf of a fern - Large (160 Kb) - Scroll down   to information Without labels Legend: 1  sorus 2  leaf blade   English name: Common fern Scientific name: Polypodium vulgare Familia: Polypodiaceae Classis: Filicopsida Phylum: Pteridophyta Regnum: Plantae The leaf of a fern. The sorus contains the sporangia in which spores are formed.

http://www.vcbio.science.ru.nl/en/image-gallery/show/labels/PL0099/print/