SECTION N: NOTABLE NUISANCE PLANT SPECIES




Indicate the absence or presence (including extent) of those alien plant species listed on the form by ticking the appropriate boxes.

Estimate abundance within the site as a whole by using a ‘✓’ when present along <33% of the bank-length or ‘E’, when present along >33% of total bank-length. Separate records are made for the bankface, and the river corridor up to 50m from the banktop. Include plants growing on mid-channel bars in the ‘bankface’ category.

The main introduced nuisance species associated with rivers in Britain and Ireland are:

  • Giant hogweed (Heracleum mantegazzianum)

Giant hogweed

  • Himalayan (Indian) balsam (Impatiens glandulifera)

Himalayan balsam


  • Japanese knotweed (Fallopia japponica)

Japanese knotweed

  • Floating pennywort (Hydrocotyle ranunculoides)

Floating pennywort

If you know that other alien species are present, list these in the space provided. A common example in some upland locations is Rhododendron. 

Species are shown on the form prefixed by an *asterisk, so the presence of a single plant should be recorded. It is important to report even an isolated occurrence, since control measures may be able to be taken.


 

Rhododendron