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Wild rose plants have regular, single flowers, with five petals. In most cultivars double flowers, having petals numbered in multiples of five, are produced. The flower also has a calyx with five lobes, many stamens, and one or more carpels. Rose sprouts have two seed leaves, so the plants are eudicots. Flowers of most cultivars bear few seeds, and the majority of them are sterile. The number of seeds is small because in double roses, flower parts that would otherwise produce seeds become extra petals. Therefore, most roses are grown from cuttings. All new rose varieties begin as seedlings, raised from fertile seeds.
Lily flowers grow one per stalk or in clusters. In contrast to roses, they have six petal-like segments, causing the flowers to resemble trumpets or ups. The flowers range from white to shades of almost all other colors except blue. Lily flowers all have three-chambered ovaries with nectaries between the chambers. They produce large, well-developed seeds which hold plenty of food-storage tissue and embryos. Plants of most species are 1 to 4 feet (0.3 to 1.3 meters) tall, though a few grow up to 8 feet (nearly 3 meters) tall. Lilies are usually raised from bulbs but can be grown from seed. Most species of these perennials bloom once, in July or August. However, flowering periods of some species begin in May or late autumn.
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