Hericium americanum
An edible tooth fungus of the northern United States and Canada that decays dead hardwood trees and logs, producing white cascades of spines in late summer and autumn. It is grown like its relative lion's mane, on supplemented hardwood sawdust or on totem logs.
Where it grows wild
White branched fruit bodies with long spines on dead and decaying hardwood trunks and logs in temperate deciduous forest.
Recorded at 138–3050 m, median 284 m (18 records); the measured sites are in the Great Lakes and St Lawrence lowlands at 49–367 m.
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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. Photo from Wikimedia Commons, used under its CC BY-SA 3.0 licence, unmodified.