The Collaborative International Dictionary of English v.0.48:

Whorled \Whorled\, a.
   Furnished with whorls; arranged in the form of a whorl or
   whorls; verticillate; as, whorled leaves.
   [1913 Webster]

WordNet (r) 3.0 (2006):

whorled
    adj 1: in the shape of a coil [syn: coiling, helical,
           spiral, spiraling, volute, voluted, whorled,
           turbinate]
    2: forming one or more whorls (especially a whorl of leaves
       around a stem) [syn: verticillate, verticillated,
       whorled]

Moby Thesaurus II by Grady Ward, 1.0:

47 Moby Thesaurus words for "whorled":
   ambagious, anfractuous, circuitous, circumlocutory, cochlear,
   cochleate, convolutional, corkscrew, corkscrewy, flexuose,
   flexuous, helical, helicoid, involute, involuted, involutional,
   labyrinthine, mazy, meandering, meandrous, rivose, rivulose,
   roundabout, ruffled, screw-shaped, scrolled, serpentine, sinuate,
   sinuose, sinuous, snaky, spiral, spiroid, torsional, tortile,
   tortuous, turbinal, turbinate, turning, twisting, twisty,
   verticillate, volute, voluted, winding, wreathlike, wreathy