[Plant-biology] Orchidaceae: Spiranthes

[Judy Darby]

Can anyone identify this species:
growing in south Louisiana pine savannah, clay soil, full sun, very  
wet.  Individuals are 23" to 91/2" tall. Flower spike is 4 2/3".   
Three basil leaves  6 1/2" long 1/4" wide and rolled/folded together.  
Upper leaf develops from stem 3 1/2" from base.  Fatish, fleshy pale  
root.  Similar to "sylvaticus," with green, but less vein and more  
defined green spots.
thank you, Judy Darby