Can someone identify the species of this angiosperm?
This is a difficult one to identify down to the species from the photos. It very much looks like a member of the genus Ononis in the pea family. The leaves, flowers, and seed pods are all characteristic of Ononis. It might be Ononis spinosa, but that is a guess.  The bright sunlight make it difficult to discern many morphological details. I can't see any visible spines on the plant to be certain. Links provided:

https://en.wikipedia.org/wiki/Ononis

https://en.wikipedia.org/wiki/Ononis_spinosa