After Lindy & Grundy butcher Amelia Rose Posada hung up her meat cleaver in 2014, she opened a floral and botanical design shop (and DIY terrarium bar) in the historic box office at the Ace Hotel theater downtown. BIRCH & BONE operates from 10 a.m. to 5 p.m., Wednesday through Sunday, then decamps so that the box office can sell tickets for shows. Posada’s exotic bouquets might feature a carnivorous- looking bloom or two, and her darkly gothic palette never fails to intrigue.