The Collaborative International Dictionary of English v.0.48:

Tassel \Tas"sel\, v. i. [imp. & p. p. Tasseledor Tasselled;
   p. pr. & vb. n. Tasseling or Tasselling.]
   To put forth a tassel or flower; as, maize tassels.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tasselled
    adj 1: fringed or adorned with tassels [syn: tasseled,
           tasselled]