Galium aparine

from WordNet (r) 3.0 (2006)

Galium aparine
    n 1: annual having the stem beset with curved prickles; North
         America and Europe and Asia [syn: {cleavers}, {clivers},
         {goose grass}, {catchweed}, {spring cleavers}, {Galium
         aparine}]

from The Collaborative International Dictionary of English v.0.48

Cleavers \Cleav"ers\, n. [From {Cleave} to stick.] (Bot.)
   A species of {Galium} ({Galium Aparine}), having a fruit set
   with hooked bristles, which adhere to whatever they come in
   contact with; -- called also, {goose grass}, {catchweed},
   etc.
   [1913 Webster]