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Developing Sori on Fern Frond

A close-up macro shot of the underside of a fern frond, showing rows of developing sori that transition in color from green to rust-brown.

The underside of a polypody frond, round sori in two neat rows along every pinna and going from green to rust as they ripen, light raking up under the leaf edge to pick out the spore cases, 100mm macro at 3:1 See more

#Seeds and spores

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