“My favorite smell is the first smell of spring in New York,” Andy Warhol once said. Perhaps in a similar spirit, Warhol began painting and silk-screening a series of highly stylized, phantasmagorically colored flowers during the 1960s. He returned to this age-old painter’s subject in 1970, when he developed a portfolio of vibrantly colored flower screenprints at the first of his two studios on Union Square. Both the florals and the location were the inspiration for Andy ...