Generally plants that move about on their own, communicate (even if unitelligibly like animals), or plant-like creatures that are sentient. Taxonomically (scientifically) these would probably be called animals despite their appearance.
Much like
crystalline creatures, these are commonly thought to be impossible (outside of mimicking the shape and color, as some insects are known to do).
If the creatures appearing plant-like are clearly labeled as something else than plants (insects, animals, etc.), then this tag may still apply but a note should be added that in-mythos they're not seen as plants.
Sanguine # 2009-07-10 17:51:46