This is an example of something called subject-dependent inversion. This kind of inversion occurs when an element like a preposition phrase is put before the subject when its basic position would be after the verb.
A green lacewing easily hideson a plant. (basic order) On a plant a green lacewing easily hides. (subject-dependent inversion)
In both cases, the preposition phrase "on a plant" functions as an adjunct of place; it modifies the verb "hides" because it describes where the green lacewing hides.