Pycnoporus sanguineus is a white rot saprobic fungus. It was discovered on Guana Island (part of the Virgin Islands) but occurs throughout the tropics, usually growing on dead hardwoods. It grows in the form of a thin dry conk with a lateral attachment to its substrate, is bright orange on all surfaces with concentric zonation, and the pores on the underside are minute. It is inedible and probably toxic. It is also a plant pathogen infecting plane and mango trees.