Sky Vine

The general idea is nailed down, details are flexible.

The sky vines occasionally release from the ground, or break into pieces. When this happens, they drift up into the outer fire, are converted to Fay dust, and settle back down, where the dust grows new sky vines

Species

There are two main species of Sky Vines: Fly Vines and Nimbus Vines.

Fly Vines

Fly Vines are just like a cross between vines, baloons, and kelp. They have huge bladders filled with floating gas, and stretch up from a solid surface, usually rock. They often become entangled in the solid-clouds, which will then hold them up, allowing some of the Fay to make the bubbles into their dwelling places. Doing this entices the fly vine to create more bubbles nearby, which leads to more inhabitants, and eventually develops huge cities of Fay, suspended between the earth and sky.

Nimbus Vines

Nimbus Vines subsist solely on solid-clouds, and any long-lasting solid-cloud will soon be entwined in them. They often hang down to bear their fruit, which looks similar to the gas bubbles of the Fly Vines. These, too, are claimed by flying Fay and inhabited.

Questions/ideas

• Where can sky vines NOT grow? Probably on sand, where they have nothing to grab on to, and thus float away. There could be plants which are hard for the sky vines to grab on to as well.
• There could be some creatures which suck the buoyant gases from the bubbles to allow themselves to fly more easily.
• What kind of strange creatures would live on/in sky vines?
• How large are sky vines? a few inches in diameter? A few meters? Are there different varieties that "mature" at different times/stages?