inky cap

inky cap

noun
any mushroom of the genus Coprinus, especially C. atramentarius, characterized by gills that disintegrate into blackish liquid after the spores mature.

Origin:
1920–25

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Britannica
Encyclopedia

inky cap

any member of a group of about 350 cosmopolitan mushroom species belonging to the order Agaricales (phylum Basidiomycota, kingdom Fungi) named for the disintegration of the mushroom cap into an inklike liquid following spore discharge. The inklike liquid has been used for writing. Inky caps grow on wood and dung. The caps of C. atramentarius and C. comatus (shaggy mane, or shaggy cap) are edible when young, before the gills turn black.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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