Figure 1
From: The Japanese knotweed invasion viewed as a vast unintentional hybridisation experiment

Distribution map of F. japonica var. japonica in the British Isles at a resolution of 10 km2. Courtesy of the Biological Records Centre.
From: The Japanese knotweed invasion viewed as a vast unintentional hybridisation experiment

Distribution map of F. japonica var. japonica in the British Isles at a resolution of 10 km2. Courtesy of the Biological Records Centre.