What is this growing in several areas of a dune garden by the entrance to an ocean beach at Sandy Hook in central NJ? (None are growing near knapweed that is already flowering, and the leaves look wrong for knapweed.)

What is this growing in several areas of a dune garden by the entrance to an ocean beach at Sandy Hook in central NJ? (None are growing near knapweed that is already flowering, and the leaves look wrong for knapweed.)