From 2speccers2tools wiki

With the evolution of more motile species such as the radioplates and the radslugs, as well as the evolution of species such as the Horrible Irradiated Baloon, the Recycling Radiobush was on the decline. To survive, the remaining populations of Recycling Radiobush would become dedicated decomposers, developing adaptations to better fill this role and giving rise to the Mushrads. While the species does still get a little bit of energy from sunlight while also getting their energy from radiation and taking in ambient amounts of spite, the Mushrad now gets most of their energy from breaking down organic matter. To help break down the organic material more efficiently, the Mushrad releases digestive enzymes to speed up the process and thus get in more energy in less time. While the adults can move still, it is very slow and as such they prefer to stay in one single spot with a good amount of adhesive secretions helping them not be dislodged by the wind or something brushing up against them. The small tendrils at the bottom have become larger so they can dig deeper within organic matter and thus inject their digestive enzymes deeper within something like a carcass. While most of the leaves have become smaller, two of them have become long and stalk-like which are entirely dedicated towards reproduction. From the very tips, hundreds of a small nymph stage are released all at once like spores, using giant leaves to help catch air currents so they can be carried a distance before landing somewhere like on a carcass where they will then grow into a new Mushrad. Being far more successful as decomposers, the evolution of the Mushrad puts even more evolutionary pressure on the Recycling Radiobush, causing the species to become extremely rare and on the brink of extinction.