JaneR
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Polygonum aviculare (Wireweed)
Pontederia cordata (Pickerel Weed)
Populus nigra (Lombardy Poplar)
Potentilla recta (Sulphur Cinquefoil)
Prunella vulgaris (Self-heal, Heal All)
Pyracantha angustifolia (Firethorn, Orange Firethorn)
Pyracantha crenulata (Firethorn)
Pyracantha sp. (Firethorn)
Pyrus ussuriensis (Manchurian Pear)
Ranunculus muricatus (Sharp Buttercup)
Ranunculus repens (Creeping Buttercup)
Ranunculus sceleratus (Celery Buttercup)
Ranunculus sceleratus subsp. sceleratus (Celery-leaved Buttercup, Celery Buttercup)
Robinia pseudoacacia (Black Locust)
Romulea rosea var. australis (Onion Grass)
Rorippa nasturtium-aquaticum (Watercress)
Rosa rubiginosa (Sweet Briar, Eglantine)
Rubus anglocandicans (Blackberry)
Rumex acetosella (Sheep Sorrel)
