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Plants that belong to knotweed family (Polygonaceae) - sudden death
Click the plants that belong to knotweed family (Polygonaceae) and avoid the ones that don't.
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Last updated: October 13, 2025
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| First submitted | October 13, 2025 |
| Times taken | 30 |
| Average score | 27.3% | Report this quiz | Report |
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Sudden Death. Clicking a wrong answer ends the quiz!
Rhubarb
Spinach
Lettuce
Pink knotweed
Pearl millet
Wheat
Buckwheat
White mustard
Japanese knotweed
Carnation
Common knotgrass
Garden cosmos
Maidenhair
Coral vine (Antigonon)
Cabbage
Common cornsalad
Sorrel
White goosefoot
Arugula
Collard
Parsnip
Prickly saltwort
Wild buckwheat (Eriogonum)
True sedge
Sea grape
Water lily
Alligator weed
Water knotweed
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