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It is one of the least common knotweeds found in the UK, and does not particularly resemble such knotweeds as Japanese, Giant, Bohemica or Dwarf. It grows to an average height of 1.8-2 metres and the stems are quite different to other knotweeds. They are not particularly bamboo-like and although they zig-zag this is caused by node points where groups of leaf stems branch from rather than simple alternate leaves. Brown sheaths can be found at these node points and the stems are covered in visible white hairs. Leaves are variable but tend to be long and thin, tapering to a point, and slightly crinkled along the edges. Flowers are small, white or pale pink with yellow centres and appear in upright loose clusters on the ends of the stems in mid-summer. |
