The photo I have been using as the main image for Low Hop Clover – Trifolium campestre – was actually a photograph of Black Medick – Medicago lupulina. While there are differences in the shape of the individual blossoms and of the overall plant, a key identifier is the small tooth at the end of the terminal leaflet on Black Medick.
The photo I had incorrectly identified as Trifolium campestre – this is actually Medicago lupulina
This is my replacement photo for Trifolium campestre