Canada Post’s latest stamp issue features two native wildflowers that are important sources of food for a variety of pollinators, including hummingbirds, butterflies and bees. The butterfly milkweed and spotted beebalm are perennials. The butterfly milkweed is the sole source of food for monarch butterfly caterpillars which are being impacted by deforestation and loss of native plants on their migration route. The stamps are available in booklets of 10, coils of 50, collectible coil strips of four  and 10 stamps, as well as in a souvenir sheet of two stamps. Stamps and collectibles are available at canadapost.ca and postal outlets across Canada.