This section is from the book "Harper's Guide To Wild Flowers", by Caroline A. Creevey. Also available from Amazon: Harper's Guide To Wild Flowers.
This is a one-leafed species, the leaf, from the root, somewhat broad. Flowers make a loose raceme at the top of the naked stalk. Lip, lance - shaped, often turning back. Spur, curved, as long as the lip. July to September.
In swamps and damp woods, preferring rich soil.
 
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