Chalk field plant

Chalk field plant

Observation - Chalk field plant. Description: This looks annoyingly familiar, but I can't place it! Growing in the margins of an OSR field on chalk, terminal leaflets about 1-1.5 inches long

This looks annoyingly familiar, but I can't place it! Growing in the margins of an OSR field on chalk, terminal leaflets about 1-1.5 inches long