''Boletus pyrrhosceles'' is a species of bolete (pored mushroom) native to Colombia. It was described by Roy Halling in 1992 from material collected on 20 November 1988 near the highway between Pasto and

Chachagüí Chachagüí () is a town and municipality in the Nariño Department, Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coa ...

in Nariño Department in the country's southwest, at an altitude of 2700 m. It was classified in section ''Luridii'', and thought most similar to '' Boletus austrinus'', '' Boletus flammans'' and ''

Boletus rubroflammeus ''Boletus rubroflammeus'' is a species of bolete fungus in the family Boletaceae. First described from Michigan in 1971, it is found in the eastern United States and Mexico, where it grows in a mycorrhizal association with hardwood trees. ...

''. The species name is derived from the Ancient Greek words ''pyrrhos'' "red" and ''skelos'' "legs", referring to its stem.

Description

The shape of the cap is convex to broadly convex, flattening with age, and reaching a diameter of . The margin of the cap is inrolled in young specimens before flattening out. The cap is a red-brown color that becomes more orange-brown with age. The flesh is thick, and yellow, with no detectable taste nor odor. On the underside of the cap, the spore-bearing surface comprises vertically arranged minute yellow tubes with brownish pore-like openings. The tubes are deep, adnate (fused) or subdecurrent to the

stem Stem or STEM may refer to: Plant structures * Plant stem, a plant's aboveground axis, made of vascular tissue, off which leaves and flowers hang * Stipe (botany), a stalk to support some other structure * Stipe (mycology), the stem of a mushro ...

, and the individual pores are round and small (about 1 per mm). The stem is long, thick at the apex and thick elsewhere. The upper stem surface is covered with reticulations, and the stem is a dark red-brown and furry. The mycelium is yellow. The pore surface quickly turns blue with injury, as does the stem. Unlike similar species, its cap is never sticky, even after wet weather, and its pores are much shallower. ''Boletus pyrrhosceles'' grows in association with Colombian oak ('' Quercus humboldtii'').

References

{{Taxonbar, from=Q48998491 pyrrhosceles Fungi of Colombia Fungi described in 1992