Arrhenia spathulata is a mushroom-forming fungus in the family Hygrophoraceae.

Found in Europe, it is widespread along the Atlantic coast.

[1] Its cap is 5-20 mm and hygrophanous, becoming dark grey and translucently striped when wet, and paling to a grey-brown when dry.

[2] The hymenophore has branched grey veins, that with age anastomose.

[1] Arrhenia spathulata grows on Tortula ruralis var.