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Variable-stalk Bolete
An eastern North American porcini (Boletus edulis group) of oak and other hardwood forests. It has a dry, tan to grayish-brown cap that often cracks finely with age, white pores that age yellow-olive, and a reticulate stem. It is a choice edible.
Edible and choice (Wikipedia). The main confusion is with bitter Tylopilus species such as T. felleus and T. rubrobrunneus, which have pinkish pores that age pinkish brown and a very bitter taste. They are not dangerous but spoil a meal.
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Mycology is an evolving science: names, classifications and safety information change as research advances. Entries are compiled from cited sources and reviewed, but may be incomplete or out of date — check the sources, and never rely on this library alone to identify or eat a mushroom.
