"Oh.... I see..." Neville did have the most plant knowledge of anyone she knew, so if the poison was plant-based, it certainly might help. "Well, the Aurors already requested certain medical information from the healers, interviewed them and they're going on that-- so yes, why don't you take a look? To my knowledge, they don't really have any leads yet, and if you find anything worthwhile you can always discuss it with Ron and Harry."