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Page number:285 
Remarks (public):G. abietinum can be separated from G. sepiarium by the warm brown colours of the basidiocarps while those of the latter mostly are bright rusty brown, often with a yellowish margin. Furthermore, the lamellae of G. sepiarium are far more irregular than those of G. abietinum. The tropical G. striatum is macroscopically very similar, but has a different area of distribution and range of hosts, and its spores are on the average shorter. 
Description type:Non-original description 
Description:Gloeophyllum abietinum (Bull.:Fr.) Karst. - Bidr. Känned. Finl. Natur Folk 37:80. 1882. - Daedalea abietina BuII.:Fr.. Syst. Mycol. 1:334, 1821. - Agaricus abietina Bull. Herb. Fr. pl. 442, 1789.
Basidiocarps perennial, pileate, sessile and broadly attached. mostly elongated along the substratum. rarely more than 1 cm wide. 2-8 cm long. 1-7 mm thick at the base; upper surface deep umber brown, becoming paler as if slightly washed out. but in very old basidiocarps may also become black as the upper hyphae become compacted. at first finely velutinate to tomentose, in age zonate and often more scrupose to waned or even smooth in old specimens. usually narrowly zonate and slightly sulcate, margin wavy and sharp; hymenophore lamellate with anastomosing. wavy lamellae. 8-12 per cm measured tangentially along the margin. individual lamellae about 1 mm thick, deep brown to pale brown, in section with a dark brown trama. at the base up to 10 mm deep; context dark and fibrous, up to 2 mm thick, dense close to the lamellae. looser towards the upper surface.
Hyphal system trimitic; generative hyphae with clamps, thin- to slightly thick-walled. 2-4 µm in diam; skeletal hyphae yellowish to pale rusty brown, thick-walled, nonseptate, rarely branched. sinuous. predominant in the basidiocarp. 3-6 µm in diam; binding hyphae rare. much branched. tortuous, twisted and yellowish brown, thick-walled. 2-4 µm in diam.
Cystidia abundant in hymenium, golden to rusty brown, subulate to rounded, thick-walled, smooth or with a small apical crown of crystals. 25-60 x 4-7 µm, not or only slightly projecting.
Basidia clavate. 4-sterigmate, 26-32 x 5-6 µm, with a basal clamp.
Basidiospores cylindrical, hyaline, smooth, negative in Melzer's reagent. 9-12 x 3-4 µm.
Type of rot. Causes a brown rot of dead conifers.
Cultural characteristics. See David 1968; Stalpers 1978.
Sexuality. Heterothallic and bipolar (Nobles et al. 1957).
Substrata. Dead coniferous wood of several genera including Juniperus. Larix, Picea, Pinus and Abies. rarely on hardwoods like Betula, Fagus, Populus and Quercus. In North America on many other conifers as well.
Distribution. A somewhat southern species in Europe and very rare in Fennoscandia north to Oslo, Norway; Stockholm, Sweden and southern Finland, widespread in Central Europe, North Africa, Asia, but rare in North America.
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