"Inside of" is redundant: "inside" is sufficient.
All other genus groups portray at three species example in the same image. It makes more sense to make the second image the first, official image, and then make the first image a supplemental image. Perhaps the supplemental image could be a focus on an exceptionally large but otherwise not especially notable species. Alternatively, you could merge the two images together, placing the smaller-looking species beside the original example.
"spores will use its" should be "spores will use their".
"plents body" should be "plent's body".
I recommend adding a comma after "stable source of food", although that particular sentence does fall within normal amounts of spacing. It sounds as if someone is speaking quickly to not pause to provie a comma.
"fertilizing organisms"? What do you mean?
"Florambulatioparasita" is quite a mouthful. Is there a shorter name? It's ten syllables. In comparison, the tapeworm order Diphyllobothriidea is seven syllables.
Why is there an empty pair of parentheses in the reproduction line?
When you say "plents", do you mean the entirety of the Phytozoa phylum? That's quite a lot to cover at once. It's not impossible, though, as tapeworms cover birds and mammals (chordates) as well as mollusks, but it might help to specify their various adaptations to major kinds of plents.
What about plent lineages that gave up photosynthesis, but regained it, or regained a weaker version of it? Consider Gesistratidae. A Shroom Herder, one species in Geistratidae, comes from a long line of non-photosynthetic nodents, but it has weak photosynthesis.
They gently "swim" through the air, but do they have a particular direction? It's not out of the question they could grow in a particular direction once they grow, like dodder vines, but it should be specified.
Personally, I would suggest "plentwerms", due to the Vicewyrm and Shearwyrm of Alpha having pretty distinctive names. (And also the more relevant Burrowyrm, released in the Alpha timeline, and in this same Generation, too.)