Yesterday, Christopher Petkanas in The New York Times Design Section called Constance Spry a 'Flowering Inferno."  I have written about Constance Spry myself in the past, once after interviewing a neighbor, Charlotte Thwing, who has since passed away, but who in her youth worked for Spry in her Madison Avenue shop just before World War II. Petkanas, in talking about a new biography, The Surprising Life of Constance Spry, bySue Shepard, passed on much juicier gossip than I…