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Rooting Bolete

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Rooting Bolete

Inedible

Inedible
Autumn

Autumn
Summer

Summer

Although not poisonous this mushroom is so bitter it will ruin any dish you put it in.

Mushroom Type
Common Names

Rooting Bolete (EN), Cap Tyllog Gwreiddiog (CY), Gorzkoborowik Korzeniasty (PL), Kesernyés Tinóru (HU)

Scientific Name

Boletus / Caloboletus radicans

Synonyms

Boletus albidus

Season Start

Aug

Season End

Oct

Average Mushroom height (CM)

7-10

Average Cap width (CM)

7-12

Mushroom Image

Please note that each and every mushroom you come across may vary in appearance to these photos.

Cap

Cap

7-12 cm. Off white to grey/brown, darkening with age. Can get very big and uneven and will show cracking on the surface of the cap.

Pores

Pores

Has yellow, tight, sponge like pores which bruise blue.

Stem

Stem

7-10  long, 3-4 cm diameter . Lemon yellow at the top becoming pale red or brown and ‘dirtier’ towards the swollen, slightly rooting base. The stem has a light coloured reticulation which is easiest to see towards the apex.

Flesh

Flesh

Yellow when first cut but quickly changing to off white in the cap and then turning blue.

Habitat

Habitat

Usually with oak and beech but will grow with other deciduous trees.

Possible Confusion

Possible Confusion

Other Boletes, particularly Bitter Beech Bolete (Caloboletus calopus), pictured.

Spore Print

Olive/brown. Subfusiform.

Taste / Smell

Bitter.

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COMMENTS

4 responses to “Rooting Bolete”

  1. Ian Jenkins avatar
    Ian Jenkins

    Very pretty fungus, seen in profusion in a Sheffield park.

    Reply
  2. Birgit Griem avatar
    Birgit Griem

    They’re hanging around in mid Norfolk quite profusely too. Such a shame they’re not edible.

    Reply
  3. Sean avatar
    Sean

    I have found a few of these but i have also found ones that are less destinct and could be Butter/Oak Boletes ( Butyriboletus appendiculatus).
    Both stain blue with red at the bottom of the stem and have yellow pores. I tasted a small amount of flesh and it was not bitter at all.
    Is there a definative way to tell the difference between these two species?

    Reply
    1. Eric Biggane avatar
      Eric Biggane

      The Rooting Bolete has bitter flesh.

      Reply

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