bridal-wreath

from WordNet (r) 3.0 (2006)

bridal-wreath
    n 1: Chilean evergreen shrub having delicate spikes of small
         white flowers [syn: {bridal wreath}, {bridal-wreath},
         {Francoa ramosa}]
    2: shrub having copious small white flowers in spring [syn:
       {bridal wreath}, {bridal-wreath}, {Saint Peter's wreath},
       {St. Peter's wreath}, {Spiraea prunifolia}]

from The Collaborative International Dictionary of English v.0.48

bridalwreath \bridalwreath\ n.
   a shrub ({Spiraea prunifolia}) having copious small white
   flowers in spring.

   Syn: bridal wreath, Saint Peter's wreath, St. Peter's wreath.
        [WordNet 1.5]