Fibroporia bohemica

Fruit bodies of Fibroporia bohemica grow as an irregular crust on their substrate. They are initially smooth and whitish to slightly pinkish, sometimes with sulphur-yellow colouration on the vertical surface. The tubes, which are formed later, are up to 6 mm long and yellow. The round to angular pores number 2–4 per millimetre. Numerous rhizomorphs surround the crust, and penetrate deep into the substrate; they are most abundant on old fruit bodies growing on very decayed wood. The odour of the fungus has been described as "strong and unpleasant".^[1]

The spores of F. bohemica are hyaline, smooth, and ellipsoid to somewhat cylindrical in shape. They typically measure 5–5.5 by 2.8–3 μm. The fungus has a dimitic hyphal system, with thin-walled, richly branched generative hyphae with clamps at septa, measuring 2–4.5 μm in diameter. The skeletal hyphae, measuring 3–6 μm in diameter, are thick-walled, and unbranched or only moderately so.^[1]

Found in central European coniferous forests, F. bohemica causes a brown rot on stumps of Norway spruce, or, more rarely, on Scots pine.^[1]