Gyroporus castaneus - chestnut bolete
These are very very cool boletes, where the stipes have hollow sections, and they’re quite solid and brittle feeling. They’re also not ‘true’ boletes of the Boletaceae family - but in the separate Gyroporaceae, similar to how the slimy capped Suillus boletes are also in their own family. They’re part of the much wider Boletale order (which also contains Paxillus for example).
First time I ever found these! And I almost missed them, they are incredibly good at camouflaging and hiding under leaves - I only spotted them because someone had stepped on one and the white underside stuck out. Uncommon and found more down south where I am, and I suspect the hiding skills contribute to this!