What is "stick-tight"

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

2. a seed from a sticktight[1].

n. beggar's ticks