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Polygonum bidwelliae

Bidwell knotweed

Polygonum californicum

Polygonum argyrocoleon

Daphne reichsteinii

Daphnopsis boissieri

Daphnopsis leguizamensis

Archidendron ellipticum subsp. ellipticum

Daphnopsis pillopillo

Persicaria capitata

Japanese knotweed

Podachaenium chimalapanum

Fallopia convolvulus

Black bindweed

Polygonum douglasii

Douglas's knotweed

Polygonum equisetiforme

Horsetail knotweed

Persicaria glabra

Denseflower knotweed

Polygonum glaucum

Seaside knotweed

Persicaria hispida

Persicaria hydropiper

Marsh-pepper smartweed

Persicaria longiseta

Bristly lady's-thumb

Persicaria hydropiperoides

False water-pepper

Polygonum minimum

Broadleaf knotweed