The Collaborative International Dictionary
Lady's traces \La"dy's tra"ces\, Ladies' tresses \La"dies' tress"es\ n. (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.
Wiktionary
n. Any of several species of the orchidaceous genus (taxlink Spiranthes genus noshow=1), in which the white flowers are set in spirals around a slender axis and remotely resemble braided hair.
WordNet
n. an orchid of the genus Spiranthes having slender often twisted spikes of white flowers [syn: lady's tresses]
Usage examples of "ladies' tresses".
I still remember the pride I felt when he strapped the black japanned tin lined with green to my tiny back, and though at the time I was only four and much too young to enjoy searching in the heat for rare plants like Ladies' Tresses and Green Hellebore, the names of the plants, like the dates of the English kings, were impressed upon my mind so vividly that it has been impossible for me ever to forget them.
Matthew was not used to deciding on the tints of ladies' tresses, but in this case there couldn't be much doubt.