Coprinus quadrifidus

Peck's Coprinus quadrifidus is now treated as a synonym of Coprinopsis variegata, the scaly ink cap of eastern North America. It forms clusters of grey, felt-scaled caps on buried or well-rotted hardwood, arising from a mat of rhizomorphs, and fruits in a narrow window in late spring and early summer.

At home, aim for

Day IntermediateTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Very humid airBand in Plantistry

Light ShadeDLI and PPFD in Plantistry

Expects a seasonal rest

Where it grows wild

Clusters on well-decayed hardwood logs, stumps and buried wood, or on rich leaf litter, in deciduous woods and parks. A mat of orange-brown rhizomorphs (ozonium) sits at the base.

Lowland to about 500 m in the eastern United States and southern Canada.

United StatesCanada

🔒 Growing it like that

The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:

✓ Day and night temperature targets, and the limits it tolerates

✓ Humidity band, and how to hold it

✓ Light as DLI and PPFD for a grow light

✓ Wet and dry seasons, and whether to rest it

✓ Substrate and airflow

✓ A step-by-step setup to grow it like the wild

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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app.