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Callitriche aggregate
Species aggregate, Flowering plant, Freshwater
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Galeopsis tetrahit agg. – Common Hemp-Nettle agg.
Species aggregate, Flowering plant, Freshwater
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Hydrochus elongatus
Species, Insect - beetle (Coleoptera), Freshwater, terrestrial
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Mimulus aggregate
Species aggregate, Flowering plant, Freshwater
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Orthocladius species A.
Species, Insect - true fly (Diptera), Freshwater, terrestrial
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Paraphaenocladius species A
Species, Insect - true fly (Diptera), Freshwater, terrestrial
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Spiraea aggregate
Species aggregate, Flowering plant, Freshwater
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Succisa pratensis – Devil's-bit Scabious
Species, Flowering plant, Freshwater
Bara y Cythraul, Caswenwyn, Clafrllys Gwreidd-Don, Tamaid y Cythraul, Bara'r Cythraul, Gwreidd-Don, Gwreidd-Dwn, Clais, Glaswenwyn, Calon Afal, Coryn Afal, Claiswenwyn, Poer y Diafol, Tamaid y Diafol
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