| Single frond. Cultivated material, June |
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Upper part of frond, underside showing immature sori. Cultivated material, June |
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| Underside of pinnules showing immature sori. Cultivated material, June |
 | Individual fronds. Oxfordshire, late June |
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| Detail of pinnae. Oxfordshire, late June |
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Detail of pinnae. Oxfordshire, late June |
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| Detail of pinnae. Oxfordshire, late June |
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Pinnules. Oxfordshire, late June |
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| Young plant. Oxfordshire, May |
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Developing frond. Oxfordshire, late June |
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| Small immature plant. Oxfordshire, May |
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Immature plant. Oxfordshire, late June |
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| Fronds staring to unfurl in spring. Oxfordshire, May |
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Fronds unfurling in spring. Oxfordshire, May |
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| Frond with pinnae almost fully unfurled. Oxfordshire, May |
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Fronds with pinnae almost fully unfurled. Oxfordshire, May |
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| Close-up of frond showing pinnae tips still unfurling. Oxfordshire, May |
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Oxfordshire, May |
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| Oxfordshire, late May |
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Oxfordshire, late May |
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| Cumbria, early July |
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Oxfordshire, late May |
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| Divisilobum type. Oxfordshire, July |
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Divisilobum type, fronds. Oxfordshire, July |
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| Divisilobum type, pinnules. Oxfordshire, July |
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Divisilobum type, pinnae. Oxfordshire, July |
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