The only boletus to be found in the vicinity was Suillus grevillei.

Gastrosuillus laricinius is a recent derivative of Suillus grevillei: molecular evidence.

Suillus grevillei is an edible mushroom (without consistency nor flavor) if the slimy cuticle is removed.

To insist on their origin - and thereby differentiate them from the hydroxylated pulvinones found in Suillus grevillei - Seto and coworkers named these compounds Aspulvinones.

Suillus grevillei is a mushroom with a 5-10 cm (2-4 in) cap colored from citrus yellow to burnt orange, that is at first hemispherical, then bell-shaped, and finally flattened.

In Europe, it is considered an uncommon to rare fungus and it is to be found in the same habitat as the common larch bolete, Suillus grevillei, and also the rare Suillus tridentinus.

These hydroxylated pulvinones are produced by fungal species, such as the in Europe common Larch Bolete (Boletus elegans, also known as Suillus grevillei), or by moulds such as Aspergillus Terreus.

This trihydroxylated pulvinone was found as one of the main pigments responsible for the yellow colour of the stem and caps of the European mushroom Larch Bolete (Boletus elegans, also known as Suillus grevillei).