Natural History Misc (63/139)

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Circular sori on the underside of a fertile frond of Common Polypody (Polypodium virginianum) fern against a white background. Kentucky, USA.
Circular sori on the underside of a fertile frond of Common Polypody (Polypodium virginianum) fern against a white background. Kentucky, USA.
Filename: Fern_sori_sporangia_Polypody-1.jpg
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