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varietal hybrid: Equisetum x trachyodon var. moorei (accepted name Equisetum hyemale x ramosissimum = E. x moorei Newman)
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varietal hybrid: Spartina x townsendii var. anglica (accepted name Spartina anglica)
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varietal hybrid: Atriplex x gustafssoniana var. kattegatensis (accepted name Atriplex prostrata x longipes = A. x gustafssoniana Tascher.)
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varietal hybrid: Atriplex x gustafssoniana var. kattegatensis (accepted name Atriplex prostrata x longipes = A. x gustafssoniana Tascher.)
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varietal hybrid: Populus x canadensis var. serotina (accepted name Populus nigra x deltoides = P. x canadensis Moench)
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varietal hybrid: Salix x mollissima var. undulata (accepted name Salix triandra x viminalis = S. x mollissima Hoffm. ex Elwert)
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varietal hybrid: Salix x grahamii var. moorei (accepted name Salix aurita x repens x herbacea = S. x grahamii Borrer ex Baker)
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varietal hybrid: Potamogeton x undulatus var. cooperi (accepted name Potamogeton perfoliatus x crispus = P. x cooperi (Fryer) Fryer)
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varietal hybrid: Atriplex x gustafssoniana var. gustafssoniana (accepted name Atriplex prostrata x longipes = A. x gustafssoniana Tascher.)
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varietal hybrid: Populus x canadensis var. serotina (accepted name Populus nigra x deltoides = P. x canadensis Moench)