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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.

Hypericum tetrapterum - Square-stemmed St John's-wort



Square-stalked St. John' s-wort is a plant of damp soils, growing alongside rivers and streams, in marshes and wet meadows, on old mining sites, in cliff flushes and in dune slacks. It is absent from the Isles of Scilly.



Click here to see Aphotoflora images by David Fenwick

Source:

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