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This Thelotrema resembles the much commoner T. lepidinum in general appearance, but has a grey-green (not creamy) thallus and discs with a narrower opening. The large-sized spores are grey-brown when mature, not colourless as in T. lepidinum. It grows in boggy, long-undisturbed oceanic woodlands, especially on twigs of hazel; also on ash. Western Ireland.
Original text submitted by Vince J. Giavarini