From 2speccers2tools wiki

Just before the m’ungis were going to launch into space they realisd they didnt bring any food, so one ran back and grabbed a random potted pooplant and managed to run back to the rocket in time before the countdown ended. Once they arrived at the gas planet they then genetically modified it to be yummy and to live in the gas planet. It is now positioned upside down because the leafs made it bottom heavy. on the top is a balloon to stay floating in the gas planet and the ballon is full of spores (they genetically modified it to make spores) so if it pops it blasts spores everywhere. They quickly became the dominant flora.