Poison Ivy is a common sight in the Verdant Growth, often seen hanging from trees or cave ceilings. Entities that walk through Poison Ivy - or stand on Poison Ivy Covered Strangler Leaves - will be inflicted with the Poison effect for a short duration.
Uses
Poison Ivy has a small tree of crafting uses. First off, it is a vital ingredient in Rotten Compost. Rotten Compost is a fertilizer item that behaves similarly to Bone Meal

Info
The recipe for Rotten Compost accepts any type of seeds, not just wheat seeds.
Poison Ivy can also be crafted into a Block of Poison Ivy, which poisons any entity that stands on it. These might be useful for traps, adventure maps, or mob farms - or for smelting into a Block of Toxic Ash.

Toxic Ash
Toxic Ash is the most reliable way to remove the Verdant Growth from a region. Each Block of Toxic Ash crafts to a