Trichaptum biforme, commonly known as the violet-pored bracket fungus,[2] purple tooth, or violet-toothed polypore, is a species of poroid fungus in the order Hymenochaetales.

Growing to 1–7.5 centimetres (1⁄2–3 in) in width, it is initially violet before fading into zones of white to brown, retaining violet at the margin for a time.

[3][4][5] It is sometimes confused with Trichaptum abietinum, which grows almost exclusively on conifers,[5] as do T. byssogenum and T. fuscoviolaceum.

[3] It is widely distributed and occurs on at least 65 tree hosts, but rarely on conifers.

[5] It is a saprobe that decomposes hardwood stumps and logs.