| Individual frond. Oxfordshire, late June |
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Detail of frond showing pinnae. Oxfordshire, late June |
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| Pinnae. Oxfordshire, early June. |
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Detail showing pinnules. Oxfordshire, early June |
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| Pinnules showing junction with rhachis. Oxfordshire, late June |
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Close-up of junction with rhachis. Oxfordshire, late June |
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| Pinnae and pinnules. Oxfordshire, early June |
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Pinnules. Oxfordshire, early June |
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| Pinnules. Oxfordshire, early June |
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Close-up of junction with rhachis. Oxfordshire, late June |
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| Underside of frond with sori, approaching ripeness. Hampshire, early July |
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Underside of pinnae showing sori. Hampshire, early July |
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| Underside of pinnules showing sori, approaching ripeness. Hampshire, early July |
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Fronds unfurling. Hampshire, early July |
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| Young frond. Oxfordshire, early June |
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Oxfordshire, early September |
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| Oxfordshire, late May |
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In lightly wooded limestone pavement. Cumbria, early July |
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| On stone wall. North Yorkshire, late July |
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On roof of building. Isles of Scilly, late June |
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| City ferns. Central London, May |
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City ferns. Oxford, June |
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| In mortared limestone wall, with Asplenium scolopendrium. North Yorkshire, late July |
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In limestone pavement. Cumbria, early July |
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