In the dunes, named “Westduinen” on the island of Goeree (prov. S. Holland) one of the two known Dutch localities of Spiranthes spiralis (L.) Chevall. is situated. In this locality the author counted the number of flowering specimens. This number proved to be 730 (23. VIII. 1970) and 1142 (22.VIII.1971). As a rule the species flowers in the above named locality from the second half of August until the middle of September.