Bay Bolete - Imleria badia

Bay Bolete – Imleria badia

Fungi of the Week

30th November 2020 | Info

Common name: Bay Bolete

Scientific name: Imleria badia

Introduction: The Bay Bolete (Imleria badia) is a UK-native fungus that can commonly be found throughout the UK.


Cap: Caps of a Bay Bolete can grow to reach up to 15cm in diameter and vary in colour between a bay and chestnut brown (hence their name). You will often find that younger caps may be covered in fine hairs.

Tubes/Pores: Bay Boletes have pale yellow tubes that turn green-blue once cut or bruised. These tubes end in angular pores of a similar colour (yellow). Older fruiting bodies are more likely to leave behind blue stains if touched.

Stem: Bay Boletes have distinctive stems. The base colour of the stem is often pale to dark brown while its vertical ridges create an almost streaky appearance. They have no stem ring and often have more bulbous/curved bases. If cut open, their stems reveal a white to pale yellow coloured flesh that turns blue.

Spores: Their spores are sub-fusiform and have an olive-brown coloured spore print.

Flesh: The flesh of a Bay Bolete is pale in colour (from white to a pale yellow or pink) and firm. However, if cut open or broken, this pale flesh will begin to turn blue. If this happens, you will often find that the flesh underneath the cap cuticle will turn vinaceous too.

Bay Bolete - Imleria badia

Habitat/Impact on Trees

Bay Boletes can commonly be found throughout the UK. They are ectomycorrhizal and often form in Spruce or Pine Forests. However, they also occasionally form under Beech and other deciduous broadleaf trees too.

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