The fruit bodies consist of a greyish white fertile upper surface and pale yellowish white exteriors, which become a dull yellow colour when dry. Their margins are set with short, hyaline hairs. They have very short stalks. When exposed to ammonia vapour, the fruit bodies turn a brick red colour, after which they are named. (Up to 0.5mm diameter.)
Their hosts include damp, dead stems of meadowsweet and willow herbs.
They fruit during spring and summer.
Status in Leicestershire and Rutland not known.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015