in case of kin and non-kin recognition in animals we can say, kin is like a family, two species from one family or blood relation , for example (Brother, sister, cousin, father, mother and grand mother ) like this types of relation is called Kin. and non-kin or stranger mean two species belongs to different family. and the offspring when originated from parents is called sibling. so my question is that, how we can say in case of Plants, this is sibling and this is non-sibling