You can communicate empathically with plants. All earthly plants are IQ
0, but a large tree might be “wiser”
than the average ivy, at the GM’s
whim. A plant might know how
recently it was watered or walked on,
or something else that directly bears
on its well-being, but would be unable
to relate an overheard phone conversation. Any normal plant will always
cooperate, within the limits of its ability. A mutant cabbage from Mars
might require a reaction roll!