One of the frequently encountered mysterious creatures near springs and wells, as well as other bodies is called Jenny Greenteeth. In an article in the Transactions and proceedings of the American Philological Association in 1895, Charles P.G. Scott notes in the Devil and his imps remarks:

“Jenny Green-teeth, in the vernacular Jinny Green-teeth, is the pretty name of a female goblin who inhabits wells or ponds.”

The name Jinny Green-Teeth is recorded in the Folk-speech of South Cheshire (1887) and A Glossary of Words Used in the County of Chester (1886) stating that:

“Children are often deterred from approaching such places [as wells or ponds] by the threat that “Jinny Green-Teeth will have them.”

Edwin Waugh notes in 1857  Sketches of Lancashire life and localities 

“ lurking in the streams and pools, like ‘Green-Teeth,’ and ‘Jenny Long Arms,’ waiting, with skinny claws and secret dart, for an opportunity to clutch the unwary wanderer upon the bank into the water.”

Often description is given of this goblin and it appears to be restricted to the west of the country, with references made in the Notes and queries around Manchester, Birmingham and as far east as Shropshire. Roy Vickery in a piece on his excellent Plant-Lore blog reports an account from Bebington Merseyside in the 1980s:

“Although Jenny Greenteeth was usually unseen, in about 1920 the bogey which inhabited two pools beside Moss Pitts Lane in Fazakerley, ‘had pale green skin, green teeth, very long green locks of hair, long green fingers with long nails, and she was very thin with pointed chin and very big eyes.”

Moreover it is possible that in Lincolnshire the same goblin is encountered as Jenny Hearn, Hurn or Yonde. This name is found associated with a bend of the Trent at Owston Ferry was haunted by Jenny Hearn or Hurn or Jenny Yonde. Unlike Jenny Greenteeth the creature is described. In Lincolnshire folklore Ethel Rudkin reports:

“The pygmy propels the dish rapidly across the stream by means of a minute pair of oars, the size of teaspoons. It is said, that having reached shore this being crosses the road and proceeds to browse in the field. ‘Or again it is said that a ‘thing’ is known to come crawling out of the water, having large eyes, and long hair, and tusks a walrus. It goes into the fields to feed. The river bank here curves in the shape of a horse-shoe, consequently a short-cut footpath has been used for years to counteract this bend.”

A possible ancient origin of this creature is suggested by another Lincolnshire location: Jenny Stanny Well a site has appeared to have passed through a number of name changes. Abraham de la Pryme discussed it in his 1680 discussion of Lincolnshire described the well as Julian’s Stony Well and now it is called Stanniwell. The name is suggestive of a Roman heritage.

Here interestingly, the name Jenny Stanny well has been supported by the suggestion that the site is haunted by a ghost presumably of that girl who carries her head under her arm. She is said to have drowned in the water. Is this a confusion of the Jenny Greenteeth tradition?

Interestingly in Preston the goblin is associated with a holy well. In the anonymous 1852 piece A Prestonian, ‘Preston More than Forty Years Ago’ in the Preston Chronicle:

“Near Friargate, and not far from the houses now called Mount Pleasant, was ‘Lady well’, about which the superstitious old women used to tell strange tales of one ‘Jenny Greenteeth’, who was said to be occasionally seen riding on a broomstick, cutting wonderful capers.”

The association of drowning with Jenny Greenteeth is significant as it would seem that the folklore probably developed as a way to warn children off playing in dangerous areas of water. This being done by associating the goblin with algae and duckweed. A note in an 1820s version of Notes and queries records Jenny Greenteeth being a name for duckweed in Birmingham. In A Glossary of the Words and Phrases of Furness (North Lancashire) (1869) she is called

“Jinny-green-Teeth — green conversa on pools.

“green scum on ponds, but supposed to imply the presence of a water-sprite or “boggart”, a terror to children as they pass the pond on which the appearance is seen.”

This is emphasised by an article by A.R. Vickery, Lemna minor and Jenny Greenteeth, in Folklore 94: 247-50, 1983. whose correspondent noted:

“ I was brought up in the Upton/Crenton area of the west side of Widnes in Lancashire (now Cheshire) …It was and still is…a farming area and many of the fields contained contained pits – some of them have quite steep sides Jinny was well known to me and my contemporaries and was simply the green weed Duckweed, which covered the surface of stagnant water.”

Finally, it is interesting the correspondent also notes

“Children who strayed too close to the edge…would be warned to watch out of Jinny Greenteeth, but it was the weed itself which was believed to hold children under water. There was never any suggestion there was a witch of any kind there!”

And such does a folk tradition become diminished! However, it was a clever way to use a common plant of stagnant water to signify dangerous waters – pity it wasn’t used in 1970s Public information films – Dark and dangerous water!