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Page number:9 
Description type:Non-original description 
Description:Ganoderma australe (Fries) Patouillard. Bulletin de la Société Mycologique de France 5(3): 67, 1889. Figs 1, 2a-c.
Basidiocarp perennial, pileate (or sometimes resupinate), applanate, single, broadly attached, sometimes incorporating foreign material (leaves, twigs), 7-30(-70) cm across, 4-22(-38) cm radius, and 3-13 cm thick.
Pileus surface concentrically sulcate, sometimes weakly radially ridged or knobby, with cracks on drying, not able to be dented with finger-nail, brown (58. m. Br. to 61. gy. Br.) with a dusting of spores, towards base sometimes dirty brown (79.1. gy. y. Br.) and with greenish tint (? due to algae), in absence of deposited spores narrow, grey, concentric bands may be evident on a background of olivaceous grey (154. 1. g. Gray); margin rounded, cream, 2-7 mm wide.
Hymenophore white to light grey (92. y. White to 93. y. Gray), sometimes with large areas tinted orange (52.1.0. to 70.1.0Y.) or pale yellow (89. p. Y.) following drying (not evident in fresh material); sterile margin cream, 1-7 mm wide, widest at edge furthest from substrate, all bruising brown; pores 3-5 per mm, round to angular, forming an even or sometimes slightly pitted surface. New tubes forming as an even layer over earlier tubes, or sometimes new tubes absent in zones or forming as islands.
Tubes to 95 mm deep, greyish brown (61. gy. Br.) with occasional white flecks, fading at tube mouths to cream, stuffed with white mycelium in upper parts of tubes in old fruit-bodies; strata sometimes evident but usually indistinct or lacking, with tubes to 25 mm long in a stratum.
Context composed of horizontal hyphae adjacent to the tubes arching up to meet the pileus surface perpendicularly or obliquely, weakly zonate, dark brown (59. d. Br.), slightly darker close to the tubes, soft-velvety to the touch, lacking black seams, to 60 mm thick; cortex hard, 0.5-2 mm wide, dark grey towards outer surface or sometimes brown in old specimens, brown towards inner surface, denser than underlying context, sometimes shiny when cut.
Hyphal system trimitic. In context, skeletal hyphae dominant, unbranched, 3.5-6 µm diam., brown with thickened walls (wall to 2.8 µm thick), typically with narrow lumen, straight to flexuous, towards apex paler and gradually tapering; generative hyphae hyaline, clamped, 2.5-4.7 µm diam., present only as rare fragments in mounts. Cortex composed of brown thick-walled hyphae cemented together, mostly perpendicular to pileus surface, at pileus surface with several short, pale yellow, tapering branches. In trama, skeletal hyphae narrower, to 4 µm diam.; binding hyphae present, or could be interpreted as branched ends of skeletal hyphae, the branches typically elongate; generative hyphae abundant, clamped.
Hymenium composed of projecting finger-like generative hyphae (? cystidioles) and incipient subglobose basidia, 14-16 x 11-15 µm, the latter especially towards the pore mouth; mature basidia with sterigmata not seen. Basidiospores ovoid, pale brown, apiculate, with ganodermoid wall, perisporium at apex often fully expanded in spores from a spore print, otherwise typically collapsed, (11-)11.5-14.3 x 6.7-9 µm (length to 13.3 µm in spores with apex collapsed).
Under SEM, perisporium of dried spores shrunken to form longitudinal furrows along the spore, indicating that the underlying exosporial ornamentation is arranged ± in rows, as can be observed for some spores under LM. Suprahilar plage (a depression on the 'adaxial' surface above the hilum) ± oval, 2-3 µm long x 1-3 µm across; inner wall at the depression apparently devoid of exosporial ornamentation as viewed under SEM and LM.
Spore germination: about 2% of spores collected from spore prints germinated after 11 days on potato dextrose agar at room temperature.
Spore print: reddish-brown (58. m. Br.).
Habitat: Causing a white rot of indigenous and introduced trees.
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