Nut Disco - Hymenoscyphus fructigenus

Description

A tiny cream, yellowish or buff-coloured cup or disc-shaped fungus associated with decaying acorn cups.  It can have long or short stalks and usually grows in clusters.   

This species or a related species in a species aggregate has also occasionally recorded on beech mast in Leicestershire.

Identification difficulty
Recording advice

Photograph on host plant; note substrate and associated plant species.  

Habitat

On acorns, possibly other nuts?

When to see it

Autumn.

Further Information

This may be an aggregate of species; we are not sure whether the specimens on beech mast or hazel nuts are now regarded as separate species. (see Laessoe & Petersen, 2019)

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Species profile

Common names
Nut Disco
Species group:
fungus
Kingdom:
Fungi
Order:
Helotiales
Family:
Helotiaceae
Records on NatureSpot:
7
First record:
08/10/2019 (Lewis, Steven)
Last record:
26/07/2025 (N, Matt)

Total records by month

% of records within its species group

10km squares with records

The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.

In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.

Latest images

Latest records