Dactylanthus taylorii

Dactylanthus taylorii, commonly known in English as wood rose and in Māori as te pua o te rēinga ("flower of the underworld"), is a fully parasitic flowering plant, the only one endemic to New Zealand. The host tree responds to the presence of Dactylanthus by forming a burl-like structure that resembles a fluted wooden rose (hence the common name). When the flowers emerge on the forest floor, they are pollinated by a ground-foraging species of native bat....read more on Wikipedia.