Rhodonia placenta is a species of crust fungus in the family Fomitopsidaceae.

A brown rot species, it is found in China, Europe, and North America, where it grows on decaying conifer wood.

In addition to having been transferred to several polypore genera, it is considered to be the same species as Poria incarnata described by Christian Hendrik Persoon in 1794, as well as Petter Karsten's Bjerkandera roseomaculata (1891), and Physisporus albolilacinus (1892).

[3] The fruiting body is spread out (effused) on its substrate, poroid, fairly thick, juicy and soft, with a pale rose or white colouring.

It has an "unusual repertoire" of extracellular glycoside hydrolases—secreted enzymes that break down the complex sugars found in lignocellulose.