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Page number:305 
Description type:Non-original description 
Description:DAEDALEA QUERCINA Fr. Syst.Mycol. 1:333, 1821.
FRUITBODY perennial, single or a few specimens fused laterally, broadly sessile to dimidiate, semicircular, up to 15 cm wide, 10 cm broad and 8 cm thick, strongly attached to the substrate, corky to woody hard. PILEUS flat to slightly convex often with a slightly raised base, smooth to finely velutinate, often concentrically zoned and sulcate especially near the margin, in some specimens with tufts of raised hyphae or scattered nodulae or warts, the base more rough or scrupose than the margin which is usually smooth, margin ochraceous, inner parts deeper brownish to greyish in old specimens, sometimes with pads or smaller areas with fresh outgrowths of light ochraceous mycelium, margin sharp. PORE SURFACE flat to oblique, especially close to the substrate, hymenophore irregular, along the margin elongated poroid, in the inner parts with sinuous pores or deadaloid to almost lamellate, on oblique parts the pores are deeply split in front, ochraceous, mostly 1-4 mm across measured tangentially, 6-8 lamellae per cm, walls 1-3 mm thick, tubes up to 4 cm long, light or ochraceous on the inner walls while the trama is distinctly darker. CONTEXT up to 1 cm thick, ochraceous to tobacco brown with indistinct annual zones.
HYPHAL SYSTEM trimitic, generative hyphae thin-walled, hyaline and with clamps at the septa, 1.5-4 µm in diameter, binding hyphae tortuous with short branches, thick-walled to solid, light golden yellowish brown, skeletal hyphae dominating in the fruitbody, thick-walled to solid, light brown, 3-6 µm in diameter. CYSTIDIA none, but both binding and skeletal hyphae may project into the hymenium and develop a catahymenium where the basidida emerge under favourable conditions. SPORES ellipsoid to cylindrical, hyaline, thinwalled, smooth and non-amyloid, 5.5-7 x 2.5-3.5 µm, difficult to find in most specimens as the periods of sporulation seem to be short and the basidia collapse rapidly under drying.
HABITAT. On deciduous wood. DISTRIBUTION. Cosmopolitan species, most common in the temperate zone and in areas with Mediterranean climate where the genus Quercus has its main distribution. In Africa only known from South-Africa.
REMARKS. The species can macroscopically be determined by the ochraceous pore-layer and tubes with thick dissepiments, the irregular to lamellate pores and the brownish to greyish pilear surface.
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