Polygonum aviculare L. subsp. rurivagum (Jord. ex Boreau) Berher

En: cornfield knotweed, cornfield knotgrass
Fr: renouée des champs
Provincial Status: Ni
Range: Temp. Europe; intr. in southern portions of Canada (disj.); s/eNfld., complete range uncertain.

[=Polygonum rurivagum Jord. ex Boreau (basionym)]
[=Centinodium rurivagum (Jord. ex Boreau) Fourr.]
[=Polygonum aphyllum Sennen & Elias]
[=Polygonum aviculare L. var. angustissimum Meisn.]
[=Polygonum aviculare L. var. rurivagum (Jord. ex Boreau) Nyman]
[=Polygonum elongatum Sennen & Elias]
[=Polygonum heterophyllum Lindm. subsp. rurivagum (Jord. ex Boreau) Lindm.]
[=Polygonum heterophyllum Lindm. var. angustissimum (Meisn.) Lindm.]
[=Polygonum laênnecii Sennen]

[The Nfld. range of subsp. rurivagum is uncertain. In Great Britain, where it is known as cornfield knotgrass, it is reported from fields and disturbed areas, esp. on calcareous substrates.]

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