The specific epithet heimii honors French mycologist Roger Heim.

The up to 8 millimeters wide lamellae are free, white, turns pink over time with a sawn edge.

The top layer of the hat consists of radially arranged hyphae up to 5 micrometers thick.

The spores are elliptical, smooth, translucent, inamyloid, and grow to 7 to 8.4 by 4.2 to 5.6 micrometers in size.

[1] It can be found on forests as well as cocoa, oil palm and rubber tree plantations, and also in gardens, orchards and pastures where termites of the genus Odontotermes occur.

It grows in groups, often with more than 300 specimens, rooted in a single termite nest that can accommodate up to 40 or more mushroom chambers.

The mycelium grows through the substrate (the accumulations of feces), and after a few weeks the fungus begins to form vegetative nodules that serve as food for the termites.