large shelf mushroom on hardwood stump of unknown tree species CAP: 150-250mm wide, weakly lumpy and zoned, glabrous, clammy to the touch, varying shades of plain old brown, margin broadly rounded (~10mm thick) FLESH: white, firm but very watery, exudes water when squeezed, faint concentric rings visible PORE: pure white, 2-3 per mm, holes small relative to walls, smooth, 0.5mm deep SPORE: print whitish? -- extremely faint if at all