Steve Nicholls / Lava field with growth of Dotted polypody fern (Polypodium pellucidum), Kilauea, Hawaii, USA, August 2008
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Duncan Mcewan / Common polypody fern (Polypodium vulgare) Sori on underside of frond, Scotland
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Duncan Mcewan / Common polypody fern (Polypodium vulgare) sori on underside of frond, Scotland
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Laurie Campbell / Common polypody fern (Polypodium vulgare) growing on boulder by stream, Ardnamurchan Peninsula, Argyll, Scotland, January 2009
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SCOTLAND: The Big Picture / Common polypody (Polypodium vulgare) growing in oak woodland, Airundle National Nature Reserve, Ardnamurchan Peninsula, Lochaber, Scotland, UK, June.
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SCOTLAND: The Big Picture / Common polypody (Polypodium vulgare) growing on the branch of an Oak tree (Quercus), Airundle National Nature Reserve, Ardnamurchan Peninsula, Lochaber, Scotland, UK, June.
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SCOTLAND: The Big Picture / Common polypody (Polypodium vulgare) growing on the branch of an Oak tree (Quercus), Airundle National Nature Reserve, Ardnamurchan Peninsula, Lochaber, Scotland, UK, June.
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Chris Mattison / Common polypody fern (Polypodium vulgare) frond with immature spores
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Chris Mattison / Common Polypody fern (Polypodium vulgare) underside of frond showing ripe sporangia (spore capsules). Monmouthshire, Wales, UK, December.
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Chris Mattison / RF - Common Polypody fern (Polypodium vulgare) underside of frond showing ripe sporangia (spore capsules). Monmouthshire, Wales, UK, December. (This image may be licensed either as rights managed or...
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Sebastian Kennerknecht / Common Maidenhair Fern (Adiantum aethiopicum), Rock Polypody (Polypodium calirhiza), and Lady Fern (Athyrium filix-femina), Bouverie Preserve, Glen Ellen, California
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Alex Hyde / Water cascading over naturally formed tufa dam. Tufa is a kind of limestone, formed from the precipitation of carbonate minerals which builds up around mosses and water plants to form a solid limeston...