Bay bolete

Overview

The bay bolete is a pored mushroom, a boletus in the broad older sense, with a cap in bay-brown or chestnut tones. Its scientific name is Imleria badia, from the older names Boletus badius and Xerocomus badius. The name badia refers to the cap colour.

It grows in coniferous or mixed woods, usually on the ground and sometimes on decaying stumps, and it can appear in large numbers. Guides in Sweden and the United Kingdom present it as an edible wild mushroom.

Identity and lookalikes

The cap is usually 5 to 15 centimetres across, firm, and slightly downy when young. The flesh is pale and turns slightly blue when cut. The pores are fine and creamy yellow and bruise a greenish blue when pressed.

The cep, Boletus edulis, can have a similar bay-brown cap, and the reticulate net pattern on its stem separates it from the bay bolete. Field identification of boletes needs care, and a single feature should not decide an identification.

Habitat and ecology

The species is ectomycorrhizal, forming a partnership with tree roots. Guides associate it mainly with pine, with spruce and oak in mixed woods. It fruits from summer into autumn. The IUCN assessment describes it as common and widespread across Europe and north-eastern North America.

Cooking and use

Foragers describe the flavour as mild and nutty, with a little sweetness. Caps are used fresh in cooking and dried, then rehydrated for sauces and stews. One British forager suggests that the species suits many cooking methods and points to a mushroom stroganoff as a good use. A Swedish guide calls it a very good edible and notes that larvae rarely infest it.

Cooking is the common practice in the guides reviewed. The sources do not agree on eating the bay bolete raw, and this page does not recommend it.

Safety

One British guide warns that the bay bolete contains xerocomic acid and is poisonous eaten raw, and it recommends cooking for at least fifteen minutes. The sources do not settle this point, so the safe course is to cook every bay bolete thoroughly and not to eat it raw.

Foraged boletes can be confused with other species, and an identification should be checked by someone experienced before the mushroom is eaten. This page is not an identification guide and does not replace one.