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Butyriboletus appendiculatus, commonly known as the Butter Bolete, is a choice edible mushroom found in deciduous forests. It is characterized by its yellow to brownish-yellow cap, yellow pores that stain blue when bruised, and a stout stem that may have a reticulated pattern. It is a mycorrhizal fungus, forming symbiotic relationships with trees.
How to Identify
- Cap
- The cap is typically 5-15 cm in diameter, convex when young, becoming more flattened with age. The color ranges from yellow to brownish-yellow, and the surface is smooth and dry.
- Gills
- Unlike gilled mushrooms, boletes have pores. The pores of Butyriboletus appendiculatus are yellow, small, and round. They stain blue when bruised.
- Stem
- The stem is stout, 5-12 cm long and 1-4 cm thick, usually yellow, and may have a fine reticulated pattern, especially near the top.
- Flesh
- The flesh is yellow, sometimes staining blue when cut or bruised, especially in the cap.
- Fruiting body
- The fruiting body of Butyriboletus appendiculatus is a typical bolete shape, with a cap and a central stem.
- Habitat
- This mushroom is found in deciduous forests, particularly under oak and beech trees. It is a mycorrhizal fungus.
Key Facts
- Cap surfaces: Smooth, dry
- Growth Form: Mycorrhizal
- Spore Print: Olive-brown
- Body color: Yellow to brownish-yellow
- Odor: Fruity or mushroomy
- Flesh bruises: Sometimes blue
- Height: 5-12 cm
- Cap Diameter: 5-15 cm
- Nutrient gathering: Mycorrhizal
Safe
SafeButyriboletus appendiculatus is considered edible and non-toxic.
Quick Check
- Odor: Fruity or mushroomy
- Fruiting: Summer to autumn
- Substrate: Soil, under deciduous trees
Where to Find
Europe
Butyriboletus appendiculatus is commonly found in Europe, particularly in southern and central regions.
North America
It can also be found in some parts of North America, although it is less common.
Finding Tips
Look under deciduous trees
Search for this mushroom under oak and beech trees in deciduous forests.
Check for yellow pores
Identify the mushroom by its yellow pores that stain blue when bruised.
Similar Species
Bitter Bolete
mushroom
Also known as: Tylopilus felleus
Rooting Bolete
mushroom
Also known as: Caloboletus radicans
Scientific Classification
- Phylum
- Basidiomycota
- Class
- Agaricomycetes
- Order
- Boletales
- Family
- Boletaceae
- Genus
- Butyriboletus
Storage Information
- Max Temperature: 20
- Freezing duration: N/A
- Min Temperature: 2
- Refrigeration: 3 days
How to Clean
To clean Butyriboletus appendiculatus, gently brush off any dirt or debris from the cap and stem. Avoid washing them unless necessary, as they can become waterlogged. If washing is needed, do it quickly and pat them dry immediately.
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