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Ruud de Block: Platycerium bifurcatum (Cav.) C. Chr. - BG Berlin
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Ruud de Block: Microsorum scolopendria (Burm. fil.) Copel. (Syn. Phymatosorus scolopendria (Burm. fil.) Pic. Serm.) - BG Meise
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Ruud de Block: Niphidium crassifolium (L.) Lellinger - BG Madeira
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Ruud de Block: Niphidium crassifolium (L.) Lellinger - BG Madeira
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Ruud de Block: Platycerium bifurcatum (Cav.) C. Chr. - Hertshoornvaren - BG Madeira
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Ruud de Block: Platycerium bifurcatum (Cav.) C. Chr. - Hertshoornvaren - BG Madeira
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Ruud de Block: Platycerium bifurcatum (Cav.) C. Chr. - Hertshoornvaren - BG Madeira
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Ruud de Block: Polypodiales - BG Madeira 230411
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Ruud de Block: Drynaria quercifolia (L.) J. Sm. - BG Berlin 230511-1
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Ruud de Block: Drynaria quercifolia (L.) J. Sm. - BG Berlin 230511-2
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Ruud de Block: Microgramma reptans (Cav.) A. R. Sm. (Syn. Microgramma ciliata (Willd.) Alston) - BG Berlin 230511-1