This is a rare species in the Netherlands, living at only a few sites.
However, in 2004 the orchids on Hompelvoet were discovered first: 300 flowering plants then.
In 2015, autumn lady’s-tresses orchid numbers had risen to 45,000 flowering plants.
Spiranthes orvhids in the Netherlands: here.
Report exposes Southeast Asia’s illegal orchid trade: ScienceDaily: here.