 Metrosideros robusta

Metrosideros robusta, the northern rātā, is a forest tree endemic to New Zealand.It grows up to or taller, and usually begins its life as a hemiepiphyte high in the branches of a mature forest tree; over centuries the young tree sends descending and girdling roots down and around the trunk of its host, eventually forming a massive, frequently hollow pseudotrunk composed of fused roots.