Rare Fungus Discovered In Sussex Woodland For First Time In UK

A rare fungus never before recorded in the UK has been discovered in woodland in West Sussex.

The blue-based earthtongue, scientifically known as Microglossum cyanobasis, was found at Kingley Vale National Nature Reserve by a local walker.

Amateur fungi enthusiast Liz Frost made the discovery while exploring the reserve’s ancient yew woodland, where some trees are believed to be more than 500 years old.

The fungus, which measures between 45 and 55mm, is notable for its distinctive blue-green base – a feature reflected in its name, with “cyanobasis” meaning “blue base”.

Frost initially spotted six specimens during her walk, before returning the following day and finding a further 12.

She later shared images of the find with the British Mycological Society, where it was suggested the species could be Microglossum cyanobasis – previously only identified in Spain in 2009.

DNA testing was carried out to confirm the identification, revealing a 99% match.

Speaking about the discovery, Frost said the fungi are easy to overlook due to their small size and natural camouflage among the woodland floor, which may explain why they have gone unnoticed in the UK until now.

Rachel Guy, manager of Kingley Vale National Nature Reserve, said the presence of the species is significant.

She explained it is typically found in undisturbed, nutrient-poor environments and long-established woodland soils – habitats that are becoming increasingly rare due to modern land use changes such as fertilisation, drainage and ploughing.