Links to genera Ferns and Horsetails (Monilophytes) Clubmosses and Quillworts (Lycophytes)
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| Thelypteris palustris • Marsh Fern
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| Thelypteris palustris Schott; T.thelypteroides Michx.ssp.glabra Holub; Marsh Fern
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| Fertile frond. Cultivated plant, August |
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Fertile frond, underside. Cultivated plant, August |
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| Fertile frond. Cultivated plant, August |
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Sterile frond. Cultivated plant, August |
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| Fertile frond. Cultivated plant, August |
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Detail of pinna, fertile frond. Cultivated plant, August |
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| Detail of pinna, fertile frond, underside showing immature sori. Cultivated plant, August |
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Detail of pinna, fertile frond, underside showing sori approaching ripeness. Cultivated plant, August |
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| Young fronds emerging. Cultivated plants, early June |
 | Young fronds emerging. Cultivated plants, early |
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| Young frond showing crozier. Cultivated plant, early June |
 | Close-up of crozier. Cultivated plant, early June |
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| Cultivated plants, July |
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