WordNet sense 1 (deciduous New Zealand tree whose inner bark yields a strong fiber that resembles flax and is called New Zealand cotton):

ribbon tree, Plagianthus betulinus, Plagianthus regius

WordNet sense 2 (small tree or shrub of New Zealand having a profusion of axillary clusters of honey-scented paper-white flowers and whose bark is used for cordage):

houhere, lacebark, Hoheria populnea