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Taxon group
- flowering plant (142)
- conifer (2)
- moss (2)
- horsetail (1)
Establishment means
- Non-native (140)
- Native (7)
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Populus nigra x laurifolia = P. x berolinensis – Berlin Poplar non-native
Species hybrid, Flowering plant, Terrestrial
Poplysen Berlin, Poplys Berlin
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Populus trichocarpa x balsamifera = P. 'Balsam Spire' – Hybrid Balsam-poplar non-native
Species hybrid, Flowering plant, Terrestrial
Poplysen Gigantea
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Populus trichocarpa x deltoides = P. x generosa – Generous Poplar non-native
Species hybrid, Flowering plant, Terrestrial
Poplysen Hael, Poplys Hael
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Primula x pruhonicensis non-native
Species hybrid, Flowering plant, Terrestrial
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Pterocarya fraxinifolia x stenoptera (P. x rehderiana) non-native
Species hybrid, Flowering plant, Terrestrial
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Quercus cerris x suber = Q. x crenata – Lucombe Oak non-native
Species hybrid, Flowering plant, Terrestrial
Lucombe's Oak, Spanish Oak, Derwen Lucombe, Derw Lucombe
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Rheum palmatum x rhaponticum = R. x hybridum – Rhubarb non-native
Species hybrid, Flowering plant, Freshwater, terrestrial
Rhiwbob, Rheonllys
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Rosa arvensis x gallica = R. x alba – White Rose non-native
Species hybrid, Flowering plant, Terrestrial
White Rose (of York), Rhosyn Gwyn Efrog
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Rosa arvensis x rugosa = R. x paulii non-native
Species hybrid, Flowering plant, Terrestrial
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Rubus odoratus x parviflorus = R. x fraseri non-native
Species hybrid, Flowering plant, Terrestrial
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Salix alba x babylonica = S. x sepulcralis – Weeping Willow non-native
Species hybrid, Flowering plant, Freshwater, terrestrial
Helygen Wylofus, Helyg Wylofus
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Salix euxina x alba = S. x fragilis – Crack-willow non-native
Species hybrid, Flowering plant, Freshwater, terrestrial
Hybrid Crack-willow, Hybrid Crack-Willow, Bedford Willow, Fork-flowered Willow, Crack Willow, Helygen Frau, Helygen Frau Groesryw, Helyg Brau
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Salix euxina x alba x babylonica = S. x pendulina – Weeping Crack-willow non-native
Species hybrid, Flowering plant, Freshwater, terrestrial
Helygen Frau Wylofus
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Salix pentandra x alba = S. x ehrhartiana – Ehrhart's Willow non-native
Species hybrid, Flowering plant, Freshwater, terrestrial
Helygen Ehrhart, Helyg Ehrhart
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Salix pentandra x euxina x alba = S. x meyeriana – Shiny-leaved Willow non-native
Species hybrid, Flowering plant, Freshwater, terrestrial
Helygen Loywddail
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Salix purpurea x viminalis = S. x rubra – Green-leaved Willow non-native
Species hybrid, Flowering plant, Freshwater, terrestrial
Helygen Werdd, Helyg Gwyrdd
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Salix purpurea x viminalis x cinerea = S. x forbyana – Fine Osier non-native
Species hybrid, Flowering plant, Freshwater, terrestrial
Helygen Wiail Fain, Helyg Gwiail Main
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Salix triandra x viminalis = S. x mollissima – Sharp-stipuled Willow non-native
Species hybrid, Flowering plant, Freshwater, terrestrial
Helygen Stipylau Miniog
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Salix viminalis x aurita = S. x fruticosa – Shrubby Osier non-native
Species hybrid, Flowering plant, Freshwater, terrestrial
Helygen-Wiail Brysgwyddog
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Salix viminalis x caprea = S. x smithiana – Broad-leaved Osier non-native
Species hybrid, Flowering plant, Freshwater, terrestrial
Silky-Leaved Osier, Helygen-Wiail Lydanddail, Helygen Dail Sidan, Helygen Smith, Helygen Sidanddail, Helyg Dail Sidan