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Ruud de Block: Sagittaria montevidensis - BG Dresden-001
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Ruud de Block: Sagittaria montevidensis - BG Dresden-002
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Ruud de Block: Sagittaria montevidensis - BG Dresden-005
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Ruud de Block: Sagittaria sagittifolia L. - Pijlkruid - Kampen
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Ruud de Block: Hydrocleys martii Seub. - Hortus Botanicus Leiden
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Ruud de Block: Hydrocleys martii Seub. - Hortus Botanicus Leiden
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Ruud de Block: Hydrocleys martii Seub. - Hortus Botanicus Leiden
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Ruud de Block: Aquarius glaucus (Rataj) Christenh. & Byngo (Syn. Echinodorus glaucus Rataj) - BG Berlin
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Ruud de Block: Aquarius glaucus (Rataj) Christenh. & Byngo (Syn. Echinodorus glaucus Rataj) - BG Berlin
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Ruud de Block: Aquarius glaucus (Rataj) Christenh. & Byngo (Syn. Echinodorus glaucus Rataj) - BG Berlin
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Ruud de Block: Aquarius glaucus (Rataj) Christenh. & Byngo (Syn. Echinodorus glaucus Rataj) - BG Berlin
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Ruud de Block: Aquarius grandiflorus (Cham. & Schltdl.) Christenh. & Byng (Syn. Echinodorus grandiflorus (Cham. & Schltdl.) Micheli) - BG Berlin
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Ruud de Block: Aquariuss grandiflorus (Cham. & Schltdl.) Christenh. & Byng (Syn. Echinodorus grandiflorus (Cham. & Schltdl.) Micheli) - BG Berlin
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Ruud de Block: Aquarius paniculatus (Micheli) Christenh. & Byng (Syn. Echinodorus paniculatus Micheli) - BG Berlin
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Ruud de Block: Aquariuss grandiflorus (Cham. & Schltdl.) Christenh. & Byng (Syn. Echinodorus grandiflorus
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Ruud de Block: Hydrocleys nymphoides (Humb. & Bonpl. ex Willd.) Buchenau - BG Berlin
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Ruud de Block: Hydrocleys nymphoides (Humb. & Bonpl. ex Willd.) Buchenau - BG Berlin
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Ruud de Block: Hydrocleys nymphoides (Humb. & Bonpl. ex Willd.) Buchenau - BG Berlin
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Ruud de Block: Hydrocleys nymphoides (Humb. & Bonpl. ex Willd.) Buchenau - BG Berlin
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Ruud de Block: Limnocharis flava (L.) Buchenau - Gele moerasparel - BG Meise-231016-1
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Ruud de Block: Limnocharis flava (L.) Buchenau - Gele moerasparel - BG Meise-231016-2
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Ruud de Block: Limnocharis flava (L.) Buchenau - Gele moerasparel - BG Meise-231016-3
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Ruud de Block: Limnocharis flava (L.) Buchenau - Gele moerasparel - BG Meise-231016-4
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Ruud de Block: Limnocharis flava (L.) Buchenau - BG Meise 241016-2