Methanosian

Methanosians are a floral sapient species from the swamp planet Methanos.

Homeworld
Methanos is described as a swamp planet that has an atmosphere that is toxic to most life forms. Methanos also has large underground deposits of methane gas that sometimes escape and create geysers of flame that to jumps up to twenty feet into the air.

Biology
Methanosians are descended from carnivorous swamp plants, but at some point in their evolution Methanosians evolved into herbivores with. Breaking down rotting plant matter in their pitcher plant-like stomachs to produce the flammable gas methane which they used for their fire attacks. They are strong enough to push down a large Highbreed weather tower.

Evolution
Methanosians undergo a metamorphosis process that results in them "blossoming", though their true evolution involves them changing into bulky brown tree-like creature with big blue heads. They gain the ability to use blue jet-like fire.