description Boletus appendiculatus Overview
*Boletus appendiculatus* is a European bolete now often treated under the name *Butyriboletus appendiculatus*. It forms mushroom fruiting bodies with a yellow to brown cap, yellow pores, and flesh that can show blue staining when bruised; the species is associated with broadleaf woodland. It is regarded as edible when correctly identified, but its changing taxonomy means older field guides may list it under the former genus.
help Boletus appendiculatus FAQ
Why is Boletus appendiculatus now called Butyriboletus appendiculatus?
DNA-based classification separated this species and related boletes from the core genus Boletus, leading to the genus name Butyriboletus. The species was originally described as Boletus appendiculatus by Jacob Christian Schäffer in 1774. [Taxonomic overview](https://en.wikipedia.org/wiki/Butyriboletus_appendiculatus)
How can Butyriboletus appendiculatus be recognized?
Typical features include a yellow to brown cap, bright yellow pores and stem, and flesh that can turn blue when bruised or cut. It is usually associated with broadleaf trees such as oak and beech in Europe. [Burke Herbarium](https://burkeherbarium.org/imagecollection/taxon.php?Taxon=Boletus+appendiculatus)
Does blue staining mean this bolete is poisonous?
No, blue staining by itself does not establish either identity or toxicity. Some guides describe Butyriboletus appendiculatus as edible, but similar boletes exist and a mushroom should not be eaten based on the colour reaction alone. [Taxonomic overview](https://en.wikipedia.org/wiki/Butyriboletus_appendiculatus)
Which trees and habitats support Butyriboletus appendiculatus?
In Europe it grows singly or in groups under hardwoods, especially old oak and beech. North American records also associate it with live oak and tanoak, particularly in the Pacific Northwest. [Taxonomic overview](https://en.wikipedia.org/wiki/Butyriboletus_appendiculatus)
explore Explore More
Reviews & Comments
Write a Review
Be the first to review
Share your thoughts with the community and help others make better decisions.
