The Collaborative International Dictionary of English v.0.48:

houhere \houhere\ n.
   A small tree or shrub (Hoheria populnea) of New Zealand
   having a profusion of axillary clusters of honey-scented
   paper-white flowers and whose bark is used for cordage.

   Syn: lacebark, ribbonwood, Hoheria populnea.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

houhere
    n 1: 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 [syn: lacebark,
         ribbonwood, houhere, Hoheria populnea]