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Forest Vines to Snow Tussocks: The Story of New Zealand Plants

Column Roots

Column Roots

Pohutukawa (Metrosideros excelsa) forms aerial roots very readily, which run down the trunk to the ground. Sometimes it forms column roots from more-or-less horizontal branches. Except where the trees have a semi-sprawling habit on coastal cliffs, these roots often do not reach the ground, but branch profusely at the lower end to give a straw broom effect (Fig. 15). Similar roots can be observed in some tropical figs (Ficus).