The division of plants after their kind is not made according to their relationship to humans, as many interpreters think. P differs here from the earlier creation accounts; he is not thinking of those plants which serve humans for food, but is concerned with the general division of all plants according to their kind. This is something very different. It is certainly correct that the species, particularly of animals, are very important for P in the division into clean and unclean (Lev 11:3ff.*);