Poppy of Thorns

The Poppy of Thorns is a plant from the Witchery mod. These are trapped poppies, and look identical to normal poppies. When an entity walks over this plant, the plant will turn into a four block high cactus, and the block below it will turn into sand. The plant is consumed whenever an entity walks over it. The Poppy of Thorns can only be harvested by breaking it with a Boline.

Prior to Minecraft 1.7, this plant was called the Rose of Thorns.