Ascot Hat

Ascot Hat
Edible
Autumn
Summer

The genus name, Hortiboletus, refers to the latin ‘hortus‘ meaning garden where the Hortiboletus bubalinus can often be found growing with Poplar or Lime trees.

Scientific Name – Boletus / Hortiboletus bubalinus

Common Names:

Ascot Hat (EN), Poplar Bolete, Cap Tyllog Bwff (CY), Parkogrzybek Morelowy (PL), Homoki Tinóru (HU)


Ascot Hat cap

6-10 cm. Pale brown with slight red or yellow hues, lighter towards the edge. Starts of rounded but becoming flatter and more uneven with age.

Ascot Hat pores

Yellow to pale yellow sometimes with olivaceous hints. Angular not round and bruising blue/green.

Ascot Hat stem

6-10 cm long, 1-1.5 cm diameter. Fairly thin for a Bolete, pale background covered in vertical red ‘fibres’.

Ascot Hat flesh

Off white/yellow in the stem. White in the cap staining pink under the cuticle and blue above the pores.

Ascot Hat habitat

Often in parks, gardens and urban environments under Lime or Poplar trees.


Other Boletes but none of the poisonous varieties.


Olive brown. Subfusiform.


Investigate the areas around poplar and lime trees in urban park settings or domestic gardens. Inspect the base of hornbeam, birch, beech, and spruce trees for signs of ascot hat. Seek out woodland edges and clearings where sunlight is abundant as ascot hat favors these conditions. Focus on well-drained areas with slightly alkaline soil, avoiding over-watered or acidic terrains. Gently probe the soil around these trees without disturbing the ecosystem, as ascot hat may be hiding just beneath the surface.