Clusters of sporangia (sorus) producing spores.
Ferns are my favourite shade plants. I love them because of their feathery leaves texture and bushy growth. They are low maintenance plants with a very few - if any - pests and diseases. Ferns thrive in a light to moderate shade and moist, rich in organic matter soil. Primarily, they are woodland plants so make sure to make the similar growing conditions for them in the garden. I have them under the bushes and trees in shady borders combined with Hostas, Astrantias and other shade and moisture loving plants.
They reproduce by spores.
Athyrium filix-femina (Lady Fern) has nice, pale green feathery leaves.