First person to use this name on MO: Erlon Bailey
Name: Ganoderma sculpturatum
Author: (Lloyd) Ryvarden
Citation: Mycotaxon 35 (2): 235 (1989) [MB#126289]
Ryvarden, L.; Johansen, I. 1980. A preliminary polypore flora of East Africa. :1-636
Page number : 91
Remarks (internal) : The dull pulverulent surface becoming thick and blackish by age and the pale spotted context are distinctive macroscopical characteristics. The long spores are also unusual in the genus.
Description type : Non-original description
Description : GANODERMA NEUROSPORUM Furt. Persoonia 4:386, 1967. [Identification later corrected by Ryvarden]
FRUITBODY perennial, pileate, applanate, sessile to substipitate with a distinct attenuated base, semicircular to fanshaped, up to 15 cm wide and long, 1-4 cm thick at the base, woody hard, margin obtuse and bent downwards.
PILEUS dull and with a cinnamon to umber pulverulent layer of spores below which there is a varnish-like cuticle, but the fruitbody has to be sectioned to observe it properly, by age the spores are partly worn away and the surface becomes dark brown to almost blackish and the cuticle becomes thicker and dull, surface unzoned, variably radially wrinkled, glabrous, smooth to warted or rugulose.
PORE SURFACE white when fresh and then stained when touched, clay-coloured to pale brown when old and dry, pores narrow, 3-4 per mm and with very thick walls on the pore surface (2-3 times the width of the pore-openings) and thus almost invisible to the naked eye, tubes rather thin-walled and the individual tubes are much wider than the partly closed pored opening, tube-walls dark brown, tubes up to 2 cm deep and only faintly stratified.
CONTEXT up to 2 cm thick, wood-coloured and strongly contrasting the dark brown tubes, in the lower part with numerous small brown spots and short streaks, the upper part pure wood-coloured, context covered with a dark brown, hard crust, up to 0,5 mm.
HYPHAL SYSTEM trimitic, generative hyphae hyaline and with clamps, 2-4 µm wide, in the cuticle thick-walled, pale brown and of variable cell-length and width, forming a palisade of swollen hyphal ends, but the clamps are mostly very difficult to observe, skeletal hyphae dominating in the fruitbody, in the tubes tinted yellowish, agglutinated in a resinous matrix, 4-6 µm wide, solid to very thick-walled in the context looser and hyaline except for in the coloured spots, solid to very thick-walled, 3-7 µm wide, mixed with narrow and intricately branched binding hyphae 1-3.5 µm wide. In the dark cuticle partly of coloured skeletal hyphal ends and agglutinated swollen and irregular generative hyphae with thickened walls and rather short cells except for the apical cell which may become up to 50 µm long and 10 µm wide in the top. SPORES ellipsoid and slightly truncate, finely verruculose, pale yellow, 17-20 × 10-12 µm.
HABITAT. On deciduous wood.
DISTRIBUTION. South America, Kenya, Tanzania and Malawi.
Created: 2015-03-10 17:05:31 EDT (-0400) by Erlon Bailey (Herbert Baker)
Last modified: 2018-04-03 23:22:53 EDT (-0400) by Erlon Bailey (Herbert Baker)
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