
Devil'S Urn
urnula craterium
The Devil's Urn (Urnula craterium) is a fascinating early spring fungus easily recognized by its distinctive, dark, cup-like appearance. Resembling a charred, leathery goblet sprouting from the forest floor, it is often one of the first macrofungi to emerge after the snow melts. For avid mushroom foragers, spotting a Devil's Urn is a moment of excitement, as it acts as a classic phenological indicator that the prized morel mushroom season is just around the corner. Ecologically, this fungus lives a double life. It begins as a weak parasite on living oak trees, causing a disease known as Strumella canker, before transitioning into a saprobe that feeds on the dead, decaying hardwood. Its striking appearance and unique life cycle make it a captivating find for nature enthusiasts exploring early spring woodlands.
生息地: Found in temperate hardwood forests, particularly on or near decaying oak logs, buried branches, and fallen timber.
外見
The Devil's Urn forms a deep, cup-shaped or urn-like fruiting body that typically measures 4 to 8 centimeters in height and 3 to 4 centimeters wide. Its exterior is dark brownish-black with a slightly fuzzy or scaly texture, while the spore-bearing interior surface is smooth and jet black. As the fungus matures, the rim of the cup often splits, tearing into ragged, star-like margins. It is attached to the substrate by a short, tough, and sometimes buried stalk, giving it the appearance of a dark chalice resting directly on the leaf litter.

カテゴリ
菌類レア度
Common
危険度
1/5 · 非常に低い
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おもしろい事実
Despite its eerie name and black, charred appearance, the fungus is entirely harmless to humans, though it is considered inedible due to its tough, leathery texture.
Foraging enthusiasts often affectionately call the Devil's Urn a 'morel indicator' because its appearance signals that prized morel mushrooms will soon begin to fruit.
If you gently blow on a mature Devil's Urn, the change in air flow can trigger the fungus to release a visible, smoke-like puff of spores.
It causes a disease called Strumella canker in living oak trees, which produces a distinctive target-shaped wound on the tree's bark.
特殊能力
Spore Puffing
When exposed to a sudden change in air pressure or a gust of wind, the mature cup can forcibly eject its spores in a visible cloud resembling smoke.
Cryotolerance
Fruiting in early spring, this tough fungus can survive sudden frosts and freezes, pausing its growth until temperatures rise again.
Biphasic Lifestyle
It seamlessly switches between a parasitic phase on living trees to a saprobic phase decomposing the very same wood once it dies.
サイズと詳細
- 長さ
- 4-8 cm
- 体重
- 0.005-0.015 kg
- 寿命
- 1-10 年
食性と食事
The Devil's Urn extracts nutrients by breaking down the complex lignins and celluloses of dead or dying hardwood trees.
年齢による違い: Transitions from a weak parasite on living oaks to a saprobe decomposing dead wood.
主な食物
- Decaying oak wood
- Fallen hardwood branches
- Buried hardwood logs
採餌方法
- Mycelial Expansion
生態系とのつながり
Springtails
Collembola
Serves as a host and food source for tiny early spring mycophagous arthropods.
White Oak
Quercus alba
Parasitizes and later decomposes the wood of specific hardwood trees.
Yellow Morel
Morchella esculenta
Shares the same microhabitat and early spring fruiting triggers, acting as an indicator species for foragers.
特徴
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別名
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安全性
危険度
1/5 · 非常に低い
まだ特別な安全上の注意はありません。
よくある質問
Devil'S Urnを見分けるには?
Devil'S Urnを識別する最も簡単な方法は、Snappit自然識別アプリを使用することです。
Devil'S Urnの長さは何ですか?
4-8 cm
Devil'S Urnの体重は何ですか?
0.005-0.015 kg
Devil'S Urnの寿命は何ですか?
1-10 年
Devil'S Urnは何を食べますか?
The Devil's Urn extracts nutrients by breaking down the complex lignins and celluloses of dead or dying hardwood trees.
Devil'S Urnは通常どこに生息していますか?
Found in temperate hardwood forests, particularly on or near decaying oak logs, buried branches, and fallen timber.
Devil'S Urnはどのように狩りをしますか?
Mycelial Expansion
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