SEEDS, PODS AND BUDS gathered in Rock Creek Park go punky and pretty when Kensington‘s Lynda Andrews-Barry casts them in sterling and electroformed copper. Her Herban Elements line — think crepe myrtle buds as earrings and a purple coneflower ring (shown, $248, both at Herbanelements.etsy.com) — amounts to floral arrangements that last longer and look tougher than anything in a vase.