Metrosideros colensoi, the climbing rata or Colenso's rātā, is a forest liane or vine that is endemic to New Zealand. It is one of a number of New Zealand Metrosideros species which live out their lives as vines, unlike the northern rātā (M. robusta), which generally begins as a hemi-epiphyte before growing into a huge tree. It grows to around 6 metres in height and bears clusters of pink or white flowers. It is unusual amongst New Zealand's metrosideros species in that its branches display a weeping habit, forming a 'hanging curtain' appearance. Its name commemorates William Colenso, a Cornish Christian missionary who was a botanist, explorer, printer, and politician.

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