Windreth Vines

Windreth Vines are a type of plant native to the Death World of Yanth. Growing only on the cliffs of the Windreth Falls, these bright purple vines are a beautiful sight to behold.

They grow in geometric patterns across the sheer cliff face and resemble massive, intricate designs crafted by an artist. Seekers of the vines must contend with the plant's unreachable nature as well as hives of Envelopers, who nest and lay their eggs in tunnels behind the obscuring vines.

The fluids within the vines can be extracted to create a potent elixir that melds ruined flesh, with the potential to remove otherwise critical forms of injury.

Source

 * Dark Heresy (2nd Edition): Enemies Without (RPG), pg. 100