No interactions present.
It is curious that Stace 3 does not mention any G. tetrahit subspecies.
... relating to the former classification of G. bifida as a subspecies of G. tetrahit.
The other anomaly is that iSpot has inserted search links for G. x ludwigii.
Lat/Lng: 51.65361, -0.95094
OS grid ref: SU726955