Source : Webster's Revised Unabridged Dictionary (1913)

Lady's traces \La"dy's tra"ces\, Ladies' tresses \La"dies'
tress"es\ (Bot.)
   A name given to several species of the orchidaceous genus
   {Spiranthes}, in which the white flowers are set in spirals
   about a slender axis and remotely resemble braided hair.

Source : WordNet®

ladies' tresses
     n : an orchid of the genus Spiranthes having slender often
         twisted spikes of white flowers [syn: {lady's tresses}]