Boletus sensibilis
🏷️ Description
Boletus sensibilis 🍄💙🔥 is a striking red-capped bolete known for its lightning-fast blue bruising—so fast that mycologist Charles Peck named it "sensibilis" for its sensitivity! Just a touch turns the yellow pores, flesh, and stem deep blue in seconds. Found in North American woodlands, this mushroom is often confused with Boletus bicolor and Boletus pseudosensibilis, but it can be distinguished by its intense staining and lack of a strong curry scent.
⚠️ Caution! Despite conflicting reports, Boletus sensibilis is widely considered toxic—capable of causing severe gastrointestinal distress. Some sources claim it is edible after long boiling, but consumption is risky.
🔎 Identification
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Cap: 1.97 to 4.72 inches (5 to 12 cm), convex at first, then broadens with age; dry and velvety when young, becoming smooth; dirty pinkish-red to reddish cinnamon as it matures; bruises instantly blue upon handling.
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Pores: Bright yellow, turning dull orangish-brown with olive tones at maturity; bruises dark blue immediately; 2–3 angular pores per mm.
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Stem: 1.97 to 5.12 inches (5 to 13 cm) long, 0.79 to 1.38 inches (2 to 3.5 cm) thick; club-shaped; yellow to orangish-yellow with reddish streaks near the base; bruises dark blue instantly; may have fine netting near the apex.
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Flesh: Yellow throughout, bruising deep blue instantly when cut; even dried specimens can re-bruise when moistened!
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Odor: Variable—sometimes curry-like, but not always distinct.
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Spore Print: Grayish olive.
🧪 Chemical Reactions
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Ammonia: Negative on cap, turns blue to greenish on flesh.
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KOH: Gray on cap, erases blue to dull orange on flesh.
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Iron salts: Gray on cap, negative to orangish on flesh.
🌳 Habitat & Ecology
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Mycorrhizal with hardwoods, especially oaks and beech.
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Found scattered or in groups in forests east of the Rocky Mountains.
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Season: Summer and fall.
Photo sources:
Photo 1 - Author: Kristof Zyskowski (CC BY 4.0)
Photo 2 - Author: Todd Patterson (Public Domain)
Photo 3 - Author: Leigha Stahl (CC BY 4.0)
