The fruit body has a 5.5–10 cm diameter cap that has a texture reminiscent of suede or chamois and can be sticky/slimy when young.

Initially orange- or pinkish-brown, it is subconical with a thickened margin, and flattens with age and fades an ochre colour.

[3] Austroboletus occidentalis is a component of jarrah (Eucalyptus marginata) forests in southwestern Western Australia.

[6] This term is well suited for this symbiosis because of i) The Australian native fungus A. occidentalis phylogenetically belongs to an ectomycorrhizal (ECM) lineage, ii) A. occidentalis possesses several established hallmarks of the ECM symbiosis, and iii) A. occidentalis does not enter roots and hence does not form any interface structures in the root.

Austroboletus occidentalis has ECM lineage (Boletaceae) and several typical features of ECM fungi (e.g. strong phosphorus solubilization activity, limited saprotrophic capacity, lack of invertases, utilization of hexoses but not sucrose, polyphosphate biosynthesis).