The Collaborative International Dictionary of English v.0.48:

blood-twig \blood-twig\ n.
   1. a European deciduous shrub (Cornus sanguinea) turning
      red in autumn having dull white flowers.

   Syn: common European dogwood, red dogwood, pedwood.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

blood-twig
    n 1: European deciduous shrub turning red in autumn having dull
         white flowers [syn: common European dogwood, red
         dogwood, blood-twig, pedwood, Cornus sanguinea]