Tom,
The taxon Juncus ranarius is being returned by queries looking for taxa with Ellenberg Salt (S) values of 1 and for 'S' values of 4. The correct value is 4. I cannot see where the value = 1 is coming from; it is an error.
eg.https://database.bsbi.org/search.php#re ... 1606fc109c and https://database.bsbi.org/search.php#re ... 9b7d87708b
Thanks,
Andy.