Sesama genus Polygonum (212 spesies):

• Leathery knotweed (Polygonum achoreum)
• European knotweed (Polygonum arenarium)
• Oval-leaf knotweed (Polygonum arenastrum)
• Silversheath knotweed (Polygonum argyrocoleon)
• Prostrate knotweed (Polygonum aviculare)
• Narrowleaf knotweed (Polygonum bellardii)
• Bidwell's knotweed (Polygonum bidwelliae)
• Meadow bistort (Polygonum bistorta var. bistorta)
• Bolander's knotweed (Polygonum bolanderi)
• California knotweed (Polygonum californicum)
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Sesama famili Polygonaceae (2106 spesies):

• Cienega seca oxytheca (Acanthoscyphus parishii var. cienegensis)
• Airmata pengantin (Antigonon leptopus)
• Bellisima grande (Antigonon guatemalense)
• Indian valley spinycape (Aristocapsa insignis)
• American buckwheat vine (Brunnichia ovata)
• Buckwheat vine (Brunnichia Banks)
• Red triangles (Centrostegia thurberi)
• Narrowleaf spineflower (Chorizanthe angustifolia)
• Twolobe spineflower (Chorizanthe biloba)
• Twolobe spineflower (Chorizanthe biloba var. biloba)
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