The Blue-Staining Oak Leccinellum is a mycorrhizal mushroom associated with Oak trees that can be found in the summer. It can be found east of the Rocky Mountains.

The cap is bun colored, the surface is uneven to wrinkled, and the shape is evenly rounded. It bruises blue.

The pore surface is whitish to grayish when young, becoming brownish or yellowish with age.

The context bruises pink when cut.

The stipe is covered in blackish scales (scabers).

July 12th, 2023 Field Notes - Indian Cave State Park

• Growing solitarily on soil bank near trail in open mixed Oak/hickory woodland.
• Nearby Trees: American Hophornbeam, Butternut Hickory, Northern Red Oak, Black Oak, American Linden, and Ash.
• Cap light brown fading to pale tan at thin sterile margin and adorned with winkled pits.
• Hymenium tan turning lighter towards margin, bruising grayish-purple. Infected with hypomyces.
• Trama layer bruising grayish-purple when cut, thin compared to tube layer.
• Stipe thick, peeling frequently, with blackish-brown scabers that darken when handled.
• Smell: not distinctive.
• Taste: pleasant
• KOH: olive-yellow on pileipellis, light olive-yellow on hymenium, and darkening stipe.
• Ammonia: slight yellowing on stipe.