The Wild Thorny Rose also called Rosaceae Vularis was an endangered plant. At one time this rose grew wild in a Gotham City field. But when Stonegate Penitentiary was built all but one rose was destroyed. The last Wild Thorney Rose was saved by Poison Ivy and kept alive for several years. Planing to get revenge on Harvey Dent (the man responsible for getting Sonegate built and the near extinction of the Wild Thorney Rose) Ivy extracted the roses toxin and used it to poison Dent. When Ivy was captured by Batman she kept the rose in her cell and appears as a cameo in future episodes.