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Blue Foot Bolete - Xerocomellus cisalpinus

Blue Foot Bolete - Xerocomellus cisalpinus

Main features

  • Fruits Summer to Autumn

  • Usually found in small groups

  • Grows in association with trees, particularly oak, beech, spruce, cedar and pine

  • Very mild smell

  • Cap surface starts of velvet and deep brown

  • As cap ages, the skin cracks to reveal the red flushed yellow flesh beneath

  • Cap is a flat dome-shape and 5 - 10cm wide

  • Stem can be slightly wide at cap end

  • The stem is yellow, turning red towards the  base

  • Stem height is 4 - 8cm and width 1 - 1.5cm

  • Has no stem ring/skirt 

  • Red flesh found in centre of stem base

  • Flesh  turn slowly blue-green if damaged, especially in base of stem

  • Spore print is olive brown

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Blue Foot Bolete - Xerocomellus cisalpinus

Edible mushroom - advanced

Other common names: None known


Scientific name meaning: Xero is from the Greek Xer, meaning dry. Ellus Is Latin for a deminutive. In this case, like a small Xerocomus. Cisalpinus is from the Latin words Cis and Alpinus, meaning "on this side" and Alpine

Season - when will I find it? From Summer to Autumn

Habitat - where will I find it? Underneath deciduous and coniferous trees, particularly Oak, Beech, Pine, Cedar and Spruce

Description - what does it look like? 

Growth: The Blue Foot Bolete is mycorrhizal, growing in association with several trees including Oak, Beech, Spruce, Pine and Cedar. It is often found in small groups

Cap: Between 5 and 10cm wide, the cap has a shallow dome shape to it. It starts off brown with a velvety texture, but the surface skin cracks as the cap expands. The yellow flesh flushed red can be seen through the cracks

Pores: The pore surface and tubes start off lemon yellow turning slowly more green-yellow with age. When damaged, the pore surface very slowly bruises blue

Flesh: Yellow, bruising blue-green very slowly, particularly in the base of the stem

Stem: Around 4 - 8cm tall and 1 - 1.5cm wide, the stem is yellow at the top, turning red towards the base. If the stem is cut from top to bottom, a red stained area is often visible near the base. 

It is sometime slightly wider at the cap end than at the base. It has no ring, or skirt

Smell: Mild

Spore colour: Olive brown

Possible lookalikes As this has red on it, it does not pass the novice test (red and blue) for boletes. It could be easily confused with the Red Cracking Bolete (Xerocomellus chrysenteron), but this does not bruise blue-green so intensely in the stem base when damaged). The Red Cracking Bolete is also edible

Use as a food Must be cooked but has a poor flavour and texture. Used mostly to bulk out a mushroom mix

Use in herbal medicine None known

If you are suffering from any ailment or need medical advice, please see your General Practitioner

Hazards None known

Importance to other species Slugs and snails often eat these mushrooms

Always stay safe when foraging. You need to be 100% sure of your identification, 100% sure that your foraged item is edible, and 100% sure that you are not allergic to it (it is good practice to always try a small amount of any new food you are consuming). If in doubt, leave it out!

Blue Foot Bolete - Xerocomellus cisalpinus
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