Genus of about 100 species of bulbous perennials, from wooded habitats and scrub in Europe, Asia to the Phillipines, and North America. One of the most celebrated of flowers, Lilies are an elegant and diverse group of plants spectacular in borders, woodland gardens, rock gardens and containers. Lily species and hybrids range in blooming times from spring through autumn. Hybrids are generally hardier and easier to grow. The most popular hybrids are: Asiatic, which flower upward; Trumpet, whose name indicates the shape of their flowers; and Oriental, which come from Asian species. Bulbs are sold in spring and fall. Planting depth varies by flower type and bulb size, so get instructions. Watch for virus and mosaic transmitted by aphids, and destroy infected plants. Prune faded flowers, but cut stalks back only after stems and leaves turn yellow. Lilies never go completely dormant, so continue to water, but lightly. Divide in spring or fall. In areas with little winter frost, some lilies need yearly replanting or dig them up and refrigerate for a least 8 weeks.