Name in North American Boletes: Boletus badius AND Boletus badius var. macrostipitatus
- Genus 2: boletus
- Species 2: badius
- Species 3: badius var. macrostipitatus
Common Name: “Bay Bolete”
Tells: Bay-brown cap, often flat or convex. Yellow pores may age greenish, bruise blue/gray green, & are depressed by stem. White cap flesh stains yellow, then blue only by tubes.
Other Information: Oft-wrinkled stem colored like cap. Often grows on or near decaying wood, especially conifers. Cap can be viscid.
Science Notes: North American Boletes lists a parallel species, “var. macrostipitatus.” DNA tests have merged this back into the parent, which was moved to the genus “Imleria” and then renamed “badia” instead of “badius” to reflect the now-feminine genus name. Interestingly, the two were reported to have different chemical test results. The macrostipitatus cap supposedly flashed green before resolving to a dark purple-brown with ammonia, and turned black with KOH.
- NH4OH (Ammonia): Cap surface turns green to blue.
- KOH: Cap surface turns blackish. Pores turn golden brown.
- FeSO4 (Iron Salts): Cap surface turns bluish green. Flesh turns dull blue-green.