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 Add this item to the list   FOMITOPSIS RHODOPHAEUS (Lev.) Imazeki
Page number:340 
Description type:Non-original description 
Description:FOMITOPSIS RHODOPHAEUS (Lev.) Imazeki
Bull. Tokyo Sci. Mus. 6:92, 1943. - Polyporus rhodophaeus Lev. Ann. Sci. Nat. Ser. 3 vol 2:190, 1844 (L!). - Polyporus semilaccatus Berk. Grevillea 15:22, 1886 (K:). - Polyporus cinereo-fuscus Curr. Trans. Linn. Soc. Ser. 2 vol 1:124 (K:). - Polyporus aurora Ces. Roy. C. Accad. Napoli 8:5, 1879 (type not seen, but most specimens det. as such are F. rhodophaeus). - Trametes avellana Bres. Krypt. Exsicc. Museo Vindob. Cent 20 p. 157, 1910 (Si) may also be a synonym, but is somewhat deviating.
FRUITBODY annual to perennial, solitary or in small groups, pileate, applanate, broadly attached to somewhat tapering, up to 10 cm broad and 8 cm wide, 0.5-2 cm thick near the base. Consistency woody hard when dry, usually bent downwards when dry. PILEUS flat to slightly convex, upper surface cinerous, dirty brown, glaucous grey becoming black when old, regularly to irregularly concentrically zoned and sulcate, with age glabrous, slightly shiny and with a distinct crust, margin thick, round, entire or slightly lobed, cinnamon to bay, iarker than the pore surface. PORE SURFACE ochraceous, buff-woodcoloured, often with a greyish tint, darker towards the margin, pores round, 7-8 per mm, dissepiments thick and entire, slightly velvety, tubes unzoned or with few layers, total length up to 5 mm, each layer up to 2.5 mm, concolorous with the pore surface or with a more rosy tint, margin sterile, up to 5 mm wide. CONTEXT ochraceous to light fulvous, fibrous, slightly zoned reflecting different growth stages, up to 4 mm thick, darkening in KOH.
HYPHAL SYSTEM trimitic, generative hyphae clamped, hyaline and thinwalled, 2-3 µm wide, often difficult to find in the tubes. Skeletal hyphae abundant in the whole fruitbody, yellow, thick-walled to almost solid, 4-6 µm in diameter, binding hyphae slightly yellow, thin to thickwalled, 1.5-3 µm wide, with short tapering branches, often difficult to find in the tubes. Context completely dominated by golden skeletal hyphae, slightly wider than in the tubes. CYSTIDIA none. SPORES oblong ellipsoid, 3.5-4.5 x 2.3 µm, thinwalled and IKI -.
HABITAT. On dead wood. DISTRIBUTION. Asia, only collected once in Africa (Rwanda): Edward Lake. Rugege Forest. leg. Rammelo 3963 (GENT, BR).
REMARKS. Characteristic is the flat and rather thin fruitbodies with a glabrous and semi-glossy surface which do not crack with age. The species is undoubtedly close to F. dochmius, but this is a much thicker species, its surface becomes greyish-black and dull with age and cracks up radially in a very characteristic fashion.
However, the pore surface and context are identical in both species with the same pale pinkish-buff colour and the hyphal system is identical. The spores in F. rhodophaeus
seem to be somewhat shorter than in F. dochmius, but a spore-print of both species is necessary to verify this difference, as the spores observed in two fertile Asian specimens of F. rhodophaeus may be unripe.
Polyporus semitostus Berk. may be a form of F. rhodophaeus having the same type of thin applanate fruitbodies with a rather sharp and thin margin and a glabrous sulcate surface and the same very small pores and a pink-buff pore
surface and context.
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