The Collaborative International Dictionary of English v.0.48:

Clivers \Cliv"ers\ (? or ?), n.
   See Cleavers.
   [1913 Webster]

WordNet (r) 3.0 (2006):

clivers
    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]