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Flora of North America North of Mexico. Vol. 2: Pteridophytes and Gymnosperms.
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[Polypodium hexagonopterum] |
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Missouri Botanical Garden (eds.)
2005-.
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Törje, A.
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[Aspidium hexagonopterum, Polypodium hexagonopterum] |
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USDA, ARS, National Genetic Resources Program (eds.)
2002-.
Germplasm Resources Information Network (GRIN) - GRIN Taxonomy for Plants.
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