amethyst deceivern. the common woodland fungus Laccaria amethystina (family Hydnangiaceae), the smallish fruiting body of which has a cap and stalk which are purple when moist; cf. amethyst agaricn.
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1966 F. H. BrightmanOxf. Bk. Flowerless Plants 132/1Laccaria amethystea (‘Amethyst Deceiver’) closely resembles L. laccata in form and structure.
2019 B. J. Haveland tr. L. L. Woon Way through Woods 129 I even have a recipe using the Amethyst Deceiver.