- Species 2: rubricintrinus var. fairchildianus
Tells: Some-kind-of-red cap dulls with age toward tawny or brown. Orange- or red-on-yellow, blue-staining pores. Yellow cap flesh stains strongly blue.
Other Information: Yellow stem has extensive red streaks, spots, & dots, but not actual netting. Likes sandy soil with oak in the area. A southern species. Pulchroboletus rubricitrinus (a good edible) has a yellow pore surface and less red in the stem.
- NH4OH (Ammonia): Cap flesh turns olive.
- KOH: Cap flesh turns olive.
- FeSO4 (Iron Salts): Cap surface turns orange-yellow or brown.