This section is from the book "Who's Who Among The Wild Flowers", by W. I. Beecroft. Also available from Amazon: A Field Guide to Edible Wild Plants.
Spiranthes cernua. Orchis Family. Aug. - Oct.
Found in low meadows and swamps.
Newfoundland to Georgia, Minnesota and Nebraska.
Small, white or yellowish, arranged spirally on stem 6 - 12 inches high.
Long and narrow, grass-like.

Ladies' Tresses.
S. gracilis. Found in pastures and on dry hillsides. Bears flowers on one side of the stem, or spirally. Basal leaves wither before flowers bloom. Roots tuberous.
 
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