Ivy

Is ivy immortal?

Ivy has long been identified with immortality. Because it's always green and clings tenaciously to life, it is often used as a symbol of eternal life in Christian art.

http://www.arcamax.com/trivia/s-431577-400883

... it has been shown to kill breast cancer cells as well. ... (Wikipedia, D. J. Metcalfe (2005). "Hedera helix". Journal of Ecology 93: 632–648. doi:10.1111/j.1365-2745.2005.01021.x.)

(not related to "Poison-Ivy" order Sapindales, Ivy's order is Apiales)