World flora Plants of the world floraExplore

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• Genera
• Species 7

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Polygonum arenarium Waldst. & Kit.

Lesser Red-knotgrass

9 4 Observations

Polygonaceae

Polygonum arenastrum Boreau

Equal-leaved Knotgrass

170 105 Observations

Polygonaceae

Polygonum aviculare L.

Knotgrass

4,991 3,841 Observations

Polygonaceae

Polygonum bellardii All.

Narrowleaf Knotweed

27 11 Observations

Polygonaceae

Polygonum equisetiforme Sibth. & Sm.

Horsetail Knotweed

1 1 Observation

Polygonaceae

Polygonum maritimum L.

Sea Knotgrass

685 344 Observations

Polygonaceae

Polygonum romanum Jacq.

Least Concern

 

3 2 Observations

Polygonaceae

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