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]

The Collaborative International Dictionary of English v.0.48:

Beggar's ticks \Beg"gar's ticks`\
   The bur marigold (Bidens) and its achenes, which are armed
   with barbed awns, and adhere to clothing and fleeces with
   unpleasant tenacity; -- also called beggar-ticks.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

beggar-ticks \beggar-ticks\ n.
   1. the seed of bur marigolds.

   Syn: spanish needles.
        [WordNet 1.5]

   2. any of several plants of the genus Bidens having yellow
      flowers and pricky fruits that cling to fur and clothing;
      -- also called beggar's-ticks.

   Syn: bur marigold, burr marigold, beggar's-ticks, sticktight.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

beggar-ticks
    n 1: the seed of bur marigolds [syn: Spanish needles, beggar-
         ticks]
    2: any of several plants of the genus Bidens having yellow
       flowers and prickly fruits that cling to fur and clothing
       [syn: bur marigold, burr marigold, beggar-ticks,
       beggar's-ticks, sticktight]