Polygonum arenastrum
Equal-leaved Knotgrass
Polygonum aviculare
Knotgrass
Polygonum oxyspermum
Ray's Knotgrass
Portulaca grandiflora
Rose Moss
Portulaca oleracea
Common Purslane
Portulaca quadrifida
Pusley
Portulaca umbraticola
Wingpod Purslane
Reynoutria japonica
Japanese Knotweed
Rheum officinale
Tibetan Rhubarb
Rhipsalis salicornioides
Spice Cactus
Rivini humilis
Bloodberry
Rumex acetosa
Common Sorrel
Rumex acetosella
Sheep's Sorrel
Rumex confertus
Russian Dock
Rumex crispus
Curled Dock
Rumex cristatus
Greek Dock
Rumex hydrolapathum
Water Dock
Rumex maritimus
Golden Dock
Rumex obtusifolius
Broad-leaved Dock
Rumex palustris
Marsh Dock
Rumex pulcher
Fiddle Dock
Rumex rupestris
Shore Dock
Rumex sanguineus
Wood Dock
Rumex scutatus
French Sorrel