If the plants bear colorful objects that look like flowers, it may be a vestigial structure from the time when spores needed to be transported on other living things. Spores are haploid, and fertilize each other after germination, and are not fertilized via pollination.

Hmmm... are they Gymnosperms, Angiosperms, Spore-bearing plants, or something else?

Gymnosperms have open ovules (Pines, Cycads, etc.),

Angiosperms have flowers (Oaks, Sunflowers, etc.),

and Spore-bearing plants have, uhhh, spores (Ferns, Mosses, etc.).

The seeds are grown on the outside, suggesting it is a Gymnosperm, but since they grow so fast, suggesting it is an Angiosperm. The seed is grown from a block, further promoting the Angiosprerm hypothesis. But since the seed is flung, and appears to germinate quickly without proper roots, it may be a rather large spore. Spores are also grown on the outside of a leaf. The "seeds" also do not have an endosperm, like most plants do. It also seems that the asteroid plants could be the Gametophyte stage, as they are not fertilized at that time, and eventually create Sporophytes on them with sufficient nutrients (like dirt). The plants also grow Bulbils, like ferns do, in order to protect themselves.

There is more evidence supporting the Spore-Bearing Plant hypothesis than there is supporting the Seed Plant hypothesis. Therefore, these plants must be some form of Ferns, as moss doesn't grow Bulbils.

~This has been a session of Reassembly Botany with Debris. Thank you for tuning in.~