The fruit bodies are dark brown to blackish, circular, one cell thick, with central ostioles for spore release. Under the microscope they appear as a series of radiating cells, evenly coloured. They rest on the surface of their host with hyphae holding them in place.
|Phacidium lauri||Phomopsis crustosa||Microthyrium ciliatum|
|There are some nice comparison images of species 1, 2 and 4 here.|
|Small (<1mm) speckles on the upper side of the leaf only.||Pustules (c.1.5mm) on upper and lower surfaces of the leaf.||Immersed black conidiomata (0.5mm) on brown spots surrounded by a narrow black line.||Tiny black speckles (<0.5mm) on both sides of the leaf.|
Found growing individually and gregariously on both surfaces of dead holly leaves.
Whenever dead Holly leaves can be found.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015