Can you tell me what this lace is?

This is “Normandy Lace”.  It is made of bits and pieces, scraps of whatever lace can be found — both machine-made and handmade.  I see in your photo, scraps of hand-embroidered linen, handmade needle-run lace on net, and machine-made Valenciennes edging.  It is traditional Normandy work, dating from the 1920s to 1940s most likely.