During research of the plants of the Thorne Moors area I came across records of Fen Violet Viola stagnina (Plate 1, centre pages). I wondered why this plant seems to have disappeared from the area and what conditions were required for its former presence. The Thorne records are presented below in chronological order. The area now referred to as Thorne Moors has also been called Thorne Waste. Fen Violet has been known as Viola stagnina or Viola persicifolia at various times in the past.
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