Poison Ivy
Dr. Pamela Isley is a well-known botanist with experience in radical research and testing using plant cells, instead of stem cells, in the use of healing and treating all sorts of human ailments. None of her theories have been proven yet, but she's working a study being funded by Gotham University in order to hopefully do so.
Nothing is known of anyone named Poison Ivy as of yet, though Robinson Park seems to be getting rather overrun with growth for such an odd Spring season.