Graphidaceae Graphis scripta sens lat. Growth type crustose. Chemical results negative Common on smooth barked trees, branches and twigs. Host to Arthonia graphidicola, Stigmidium microspilum and Taeniolella punctata Very variable. Curved or stellate lirellae, +/- open, +/- white pruinose. Carbonaceous margins raised and unfurrowed. Mature spores colourless but brownish when old, 5-15 septate, 25-70 x 6-10 µm. Micrograph below. A species complex with four recognised species: Graphis betulina, Graphis persoonii, Graphis pulverulenta and Graphis scripta sens str Similar: G. elegans K+ yellow turning red. G. inustuloides muriform spores

Microscope photograph

Graphis scripta sens lat.
Holton Lee, Dorset. October 2012