6 Wood Discoloration

Appendix 1 259
margin; sometimes with poroid fruit bodies within surface mycelium
(1–90 mm thick), then also wider hyphae; white rot, preferential sapwood
decay,hardwoodandsoftwood,nooronlysomegrowthonmasonry
Donkioporia expansa
32 ∗ arthrospores, strands or mycelia different 33
33(32) strands black, very clear, with separate crust layer, often also hollow
when old (32), clearly thicker than 1 mm, only on wood with bark rests
or in wood in the area of in-growing roots, examine for in-growing roots;
hardwood and softwood; white rot rhizomorphs of Armillaria spp.
33 ∗ strands or mycelia different 34
34(1,23,
30,33)
on masonry, rough-casting etc.; no or slightwood decay: e.g., species of the
genera Coprinus, Peziza (white strands), Scutellinia, Pyronema, molds
(e.g., Cladosporium) and slime fungi (Enteridium, Fuligo, Trichia)
34 ∗ further species on wood which so far were rarely found in buildings: e.g.,
species of the genera Daldinia, Fomitopsis, Hyphodontia, Phanerochaete,
Phlebiopsis, Pleurotus, Polygaster, Trametes; see also Table 8.6
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