However, a phylogenetic study in 2001 resulted in the genus Phellinus being split into five new genera, and P. torulosus being renamed to Fuscoporia torulosa.

[19] The fruiting bodies of this species are semicircular or shell-shaped, with dimensions of 12–30 centimetres (4+1⁄2–12 in) broad by 4–10 cm (1+1⁄2–4 in) long.

[18] The fruiting body margin is rounded, and sometimes wavy, felt-like or tomentose on the flattened upper surface, which is typically orange-brown to rusty-brown in color.

[18] Production of visible fruiting bodies by F. torulosa does not happen until long after the tree has been initially infected, as it takes some time for the fungal mycelia to colonize the host.

[21] Although its preferred host is Quercus,[20][22] Fuscoporia torulosa has been reported growing on a variety of hardwood trees: Acer, Arbutus, Calluna, Castanea, Celtis, Ceratonia, Cercis, Cistus, Citrus, Cornus, Crataegus, Cydonia, Erica, Eucalyptus, Euonymus, Fagus, Fraxinus, Grevillea, Helianthemum, Juglans, Laurus, Malus, Melaleuca, Morus, Myrtus, Olea, Ostrya, Parrotia, Phillyrea, Pistacia, Pittosporum, Populus, Prunus, Punica, Pryus, Robinia, Rosa, Salix, Spartium, Ulex, Ulmus, Viburnum, Vitis, and more rarely, conifers like Cedrus, Cupressus, Larix, Picea, and Pinus.