Irish wildflowers

Photographs: Bantry, Co.Cork

Japanese Knotweed
Fallopia japonica
Glúineach bhiorach
Family: Polygonaceae

Flowering: August-October. Perennial. Introduced. Garden escape.

Spikes of white flowers. Reddish zig-zag stems. Broad leaves, oval-triangular, pointed. Spreads rapidly by rhizomes, forms large thickets. Height: To 2m

Roadsides, wasteland, streamsides. Widespread and very invasive introduction, difficult to eradicate. Originally introduced as garden plant. Designated as a significant invasive plant in Ireland: Managing Invasive Alien species

Similar: Giant Knotweed, F. sachalinensis.

Photographs above: Bantry, Co.Cork. September 2006

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