The Collaborative International Dictionary of English v.0.48:

stick-tight \stick"-tight`\, n. (Bot.)
   1. any of several plants having seeds tipped with barbs that
      may cling to fur or clothing, especially those of the
      genus Bidens, also called bur marigold,
      beggar-ticks, and Beggar's ticks, which have prickly
      flattened achenes. --RHUD
      [1913 Webster +PJC]

   2. a seed from a sticktight[1].
      [PJC]