WordNet (r) 3.0 (2006):

climbing hydrangea
    n 1: climbing shrub with adhesive aerial roots having opposite
         leaves and small white flowers in terminal cymes; Himalayas
         to Taiwan and Japan [syn: climbing hydrangea,
         Schizophragma hydrangeoides]
    2: deciduous climber with aerial roots having large flat flower
       heads [syn: climbing hydrangea, Hydrangea petiolaris]
    3: deciduous climber with aerial roots having white to creamy
       flowers in fairly flat heads [syn: climbing hydrangea,
       Hydrangea anomala]