The Collaborative International Dictionary of English v.0.48:

Hackelia \Hackelia\ prop. n.
   A genus of plants with seeds that stick to clothing,
   including stickseed and some of the beggar's lice.

   Syn: genus Hackelia, Lappula, genus Lappula.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Hackelia
    n 1: stickweed; beggar's lice [syn: Hackelia, genus
         Hackelia, Lappula, genus Lappula]