The fungus Ustilago filiformis affects the leaves of various Glyceria species such as Reed sweet-grass (Glyceria maxima). The epidermis of the affected leaves rupture to reveal long narrow strips of the dark red-brown spore mass.
Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features then in the comments box describe the size and identifying characters you have observed. Please state the host species when recording this fungus.
Where the host species occur.
Late summer and autumn.
Widespread in England, less well recorded elsewhere in Britain.
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