This is the 13th set in the UNPA’s series, Endangered Species. This year’s set highlights orchids. Ansellia africana, or Leopard Orchid, is named for its brown-spotted yellow flowers. The large, showy flower grows throughout Africa, where it has been used as a love charm. Ansellia africana, Phragmipedium kovachii, Cymbidium ensifolium, and Renanthera imschootiana are on the issues from the Offices in Vienna.