Cornish Biodiversity Network  -  Supporting Wildlife Recording

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Flora of Cornwall (1999)

The descriptive text, below the map, is from the Flora of Cornwall (1999), which was a Tetrad Atlas (the maps had 2km square dots or Tetrads). The map on this web page depicts the plant's distribution at the 1km square scale and shows the records made pre-2000 which were used in the 1999 Flora and those made since.

Polygonum rurivagum - Cornfield Knotgrass

Cornfield Knotgrass is a very rare weed in Cornwall. It was recorded in an arable field at Pentire Farm in 1986 (SW98F, R.W.David) and was also found nearby in the Polzeath area in 1991 (SW97J, R.W.David).


French, C.N., Murphy, R.J. & Atkinson, M. 1999. Flora of Cornwall. Wheal Seton Press, Camborne.