Splitting from their ancestor, the atmobulb adapted a new way of spreading their spores. During the three week long summer, they supply the nitroids with nutrients, allowing them to produce the gaseous ammonia that fills its bulb, and keeps it buoyant. When winter approaches, they release from the ground and float off into the atmosphere, where they stay until their supplies run out. They then burst, releasing millions of spores into the air, to settle on the ground. They have developed a mucus that coats the bulb, retaining enough gases for about a month. They have also grown a membrane that allows them to catch the wind.