Western Veladrion is the home of Cernos, as such there's a wide variety of strange and unique plant life that's restricted to this area of the continent.
Blight Vine is well known around Veladrion, every child since the "Death of Magic" has been told to avoid Blighted Vines. All plant life has the weave flowing through it, in areas where the Weave Blight is strong, the plant life becomes corrupted. Blight Vine now survive off of Blighted Weave, and perpetuate the Weave Blight. Where there are Blight Vines, the Weave Blight is even stronger, making casting far more dangerous in these locations.