Pycnoporus cinnabarinus

{{Short description|Species of fungus}}

{{Italic title}}

{{Speciesbox

| image= Pycnoporus cinnabarinus (Jacq.) P. Karst 153.jpg

| genus = Pycnoporus

| species = cinnabarinus

| authority = (Jacq.) P.Karst. (1881)

| synonyms =

• Boletus cinnabarinus Jacq. (1776)
• Trametes cinnabarina {{cite web |title=Trametes cinnabarina |url=https://www.messiah.edu/Oakes/fungi_on_wood/poroid%20fungi/species%20pages/Trametes%20cinnabarina.htm |website=www.messiah.edu |access-date=6 June 2024}}

}}{{Mycomorphbox

| name = Pycnoporus cinnabarinus

| hymeniumType = pores

| capShape = NA

| whichGills = NA

| stipeCharacter = NA

| ecologicalType = saprotrophic

| howEdible = inedible

}}

Pycnoporus cinnabarinus, also known as the cinnabar polypore, is a saprophytic, white-rot decomposer. Its fruit body is a bright orange shelf fungus. It is common in many areas and is widely distributed throughout the world. It is inedible.{{cite book |last=Phillips |first=Roger |title=Mushrooms and Other Fungi of North America |url=https://archive.org/details/mushroomsotherfu0000phil |url-access=registration |year=2010 |publisher=Firefly Books |location=Buffalo, NY |isbn=978-1-55407-651-2 |page=[https://archive.org/details/mushroomsotherfu0000phil/page/304 304]}} It produces cinnabarinic acid to protect itself from bacteria.Eggert C. Laccase-catalyzed formation of cinnabarinic acid is responsible for antibacterial activity of Pycnoporus cinnabarinus. Microbiol Res. 1997;152(3):315-318. {{doi|10.1016/S0944-5013(97)80046-8}}

The stipe and the pore surface had a positive reaction with potassium hydroxide.