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Japanese Knotweed |
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Fallopia japonica var japonica |
Former names: Reynoutria japonica, Polygonum cuspidatum
![]() Photo ©
Carl Farmer |
Common close to villages, hotels, large gardens, etc, invades shrubberies and waste ground. Not native. Plant c 2-3 m tall, forming dense thickets Skye ID: Upright bamboo-like stems with long spikes of small white flowers very numerous along the branches. Leaves cut off square at broad base, continuing broad for most of their length and then curving in to pointed tip. Other features: Stems usually reddish and zigzag. All British plants are female as far as known, and their successful spread has been entirely due to vegetative propagation. This plant is a severe threat to native species and habitats, and is often sprayed with herbicide, so that dead or partly withered stands of it are a common sight. |
![]() Photo ©
Carl Farmer |
| The last of the flowers falling from the spikes |
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