JENNA LYONS has a peony chart. Using detailed photos, it outlines the vagaries of proper peony selection for those tasked with assisting Ms. Lyons, the formidable 6-foot-tall creative director who famously outfitted Michelle Obama and countless other American women in vivid cardigans and statement necklaces during her 27-year tenure at J.Crew. The key to pleasing Jenna peony-wise is mastering the chromatic subtleties of the trendy flower. She prefers the coral ones because of the way they fade to a “pale nothing color.”
“It…