The Collaborative International Dictionary of English v.0.48:

Sprig \Sprig\, v. t. [imp. & p. p. Sprigged (spr[i^]gd); p.
   pr. & vb. n. Sprigging (-g[i^]ng).]
   To mark or adorn with the representation of small branches;
   to work with sprigs; as, to sprig muslin.
   [1913 Webster]