On side of road, close to trees. Height about 25 cm. No leaves while in flower.
No interactions present.
Went back to open flower and measure the distance from bottom petal to Stamine :3 mm
Also to appreciate the curve of tube
From these new details I get to O. hederae as O.rapum-genistae would have 2mm and no reduction in tube diameter. O minor has wrong size and shape of tube ; O major is from altitude and O. amethystea would have a different shape of tube (curved)...
Lat/Lng: 42.95, -3
Spanish Basque country