Angion

Angion is a barren planet with a highly radioactive surface that can only support radiotrophic fungi and bacteria. Tricularia, an enormous plant system comprised of 86 bladders that develops on the planet's surface, is its only lifeline. A holdfast holds the entire plant system in orbit around Angion. Tricularia draws all of the minerals it needs from Angion. Another thing to note about their world is the fact there are no fossils, it's not yet described why though.
The name "Angion" comes from the root for an angiosperm (plants with flowers and fruits) and describes an enclosed seed, but it also simply means "container, vessel."