Common Ladies’ Tresses (Nodding Ladies’ Tresses)
Flowers white with a pointed lip, arranged in a spiral around the stem, about 1/4 to 3/8 inch long, and point slightly downward. Usually has a "lily of the valley" fragrance. Blooms August–November. Stem leaves few, very narrow, clasping the flowering stem. Basal leaves have usually disappeared before the flowers appear.
There are six other Spiranthes species found in Missouri; one, shining ladies' tresses (S. lucida), flowers in May–June and is restricted to fens and seeps in the Ozark and Ozark Border regions; the other five bloom in late summer and fall.