Cornish Biodiversity Network  -  Supporting Wildlife Recording

   A B C D E F G H I J K L M N O P Q R S T U V W X Y Z restore

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.

Crassula helmsii - New Zealand Pigmyweed

This invasive and vigorous aquatic plant is native to New Zealand and Australia. It has been much sold by aquariums as an oxygenating plant for ponds, from which there has been a rapid spread since 1970. At present it occurs only in small ponds and has not been recorded from the reservoirs. It has been found at Gunver Head (SW87Y, 1986, J.E.Oliver), Lanledra Farm, Gorran Haven (SX04A, 1991, R.E.Lees), Bearah Farm, Bathpool (SX27X, 1996, M.Atkinson) and the sewage works, Helston (SW62N, 1993, R.J.Murphy).

Click here to see Aphotoflora images by David Fenwick


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