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

Many thanks to Robert Flogaus-Faust for bringing my attention to this incorrect identification.