Carrion vine/Carrion fruit
It produces fruit that have a paralytic effect on mammals but not birds or anything else. The fruit has an incredibly intoxicating aroma as to the flowers, because of this the flowers (but never the fruit) are often used as garnishes on the dishes of high end restaurants.
They photosynthesize, as well as grow into the soil to absorb rotting nutrients like fungi. They do however have another option for food.
As the vines can move, though somewhat slowly, they can dig into paralyzed victims of any that ate their fruit and begin harvesting nutrients from their flesh and blood, as the victim rots, this process speeds up and the vines grow in massive bundles on top of the corpse.
The plants own rotting parts as it loses nutrients mixes in and creates fertile soil.
For this reason, Carrion vines are sometimes thrown into mass graves to create fertile soil, so long as no one eats the fruit.