Name in North American Boletes: Boletus calopus var. frustosus
- Genus 2: Boletus
- Species 2: calopus var. frustosus
Tells: Bitter flesh DNS. Yellow to green-yellow pores stain blue, then resolve to brown. Yellowish- to gray-brown cap cracks & fissures w/age.
Other Information: Red stem is lightly netted, browner low, & yellow by the pores. The main differences compared to regular calopus are: this cap flesh does not blue; these pores resolve to brown after bluing; this stem has lighter netting; and this cap gets significantly more cracks & fissures w/age. Likes fir.
Science Notes: DNA testing moved this mushroom from Boletus to a newly erected genus called “Caloboletus”. It was also elevated to be an independent species rather than a mere variant on Caloboletus calopus.
Edibility: Avoid. Too bitter to eat.
- NH4OH (Ammonia): No data.
- KOH: No data.
- FeSO4 (Iron Salts): No data.