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a mushroom that liquefies itself into black goo to fling its own spores

means An inkcap is a type of mushroom (genus Coprinus and relatives) whose gills dissolve into a black, ink-like liquid as it matures, releasing its spores in the process.

from A plain English compound of "ink" and "cap" — "ink" because the mushroom's dissolving gills produce a dark, inky fluid (people genuinely once used it as a writing ink), and "cap" for the umbrella-like top of a mushroom. The self-digesting process behind the name has its own scientific term, "deliquescence," from Latin deliquescere, "to melt away." The genus name Coprinus is less flattering: it comes from Greek kopros, "dung," since many inkcaps sprout from manure and rich, rotting ground.

self-digestion
dissolves into inky ooze called deliquescence
writing ink
historically brewed into actual document ink
alcohol foe
one species causes violent sickness if paired with drinking
fast life
sprouts and melts within a single day
old name
called tippler's bane for its hangover-from-hell trick
for instance

coprinellus disseminatus — common inkcap mushroom found worldwide, dissolves into black ink-like liquid within hours of fruiting

coprinus comatus — shaggy inkcap, edible species native to europe and north america, must be eaten immediately before auto-digestion

coprinellus atramentarius — alcohol inky cap of europe and asia, toxic when consumed with alcohol due to coprine compound

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