That description is very small. Surely you can add more? Saying something about its climate tolerances, commonness and diversity across various habitats, variation in cytotoxin strength, and whether strength of toxin has any correlation to particular patterns could work in lengthening the description.
I noticed it causes "little damage" to other groups. What sorts of symptoms occur in other groups? For example, caffeine kills insects by suppressing an essential enzyme in their nervous systems, but it blocks sleepiness chemicals in humans. Are there varieties of plents with some resistance to toxiglobes? After all, the coffee berry borer, a kind of beetle, has bacteria in its digestive tract that allow it to break down caffeine. "Very few" species of Pioneeroots, a close relative, are toxic, so it's possible a few Pioneerroots-eaters equipped to eat poisonous things could resist these. Plowskuniks might be one candidate, though I think they are only distantly related to the likes of nodents and phlocks.