Liliaceae

The lily family, Liliaceae, consists of fifteen genera and approximately 600 species of flowering plants within the order Liliales. They are monocotyledonous, perennial, herbaceous, often bulbous geophytes. Plants in this family have evolved with a fair amount of morphological diversity despite genetic similarity. Common characteristics include large flowers with parts arranged in threes: with six colored or patterned petaloid tepals (undifferentiated petals and sepals) arranged in two whorls, six stamens and a superior ovary. The leaves are linear in shape, with their veins usually arranged parallel to the edges, single and arranged alternating on the stem, or in a rosette at the base. Most species are grown from bulbs, although some have rhizomes. First described in 1789, the lily family became a paraphyletic "catch-all" group of petaloid monocots that did not fit into other families and included a great number of genera now included in other families and in some cases in other orders. Consequently, many sources and descriptions labelled "Liliaceae" deal with the broader sense of the family.

Lilium

Lilium (members of which are true lilies) is a genus of herbaceous flowering plants growing from bulbs, all with large prominent flowers. Lilies are a group of flowering plants which are important in culture and literature in much of the world. Most species are native to the temperate northern hemisphere, though their range extends into the northern subtropics. Many other plants have "lily" in their common name but are not related to true lilies.

Description

Lilies are tall perennials ranging in height from 2–6 ft (60–180 cm). They form naked or tunicless scaly underground bulbs which are their overwintering organs. In some North American species the base of the bulb develops into rhizomes, on which numerous small bulbs are found. Some species develop stolons. Most bulbs are deeply buried, but a few species form bulbs near the soil surface. Many species form stem-roots. With these, the bulb grows naturally at some depth in the soil, and each year the new stem puts out adventitious roots above the bulb as it emerges from the soil. These roots are in addition to the basal roots that develop at the base of the bulb.

Lilium candidum

Lilium candidum, the Madonna lily, is a plant in the true lily family. It is native to Greece, the western Balkans and the Middle East, and naturalized in other parts of Europe (France, Italy, Ukraine, etc.) as well as in North Africa, the Canary Islands, Mexico, and other places. It forms bulbs at ground level, and unlike other lilies, has a basal rosette of leaves through the winter, which die back in summer. A leafy flower stem, typically up to 1.2 metres (3 ft 11 in) high, sometimes up to 2 metres (6 ft 7 in) high, emerges in late spring and bears sweetly and headily fragrant flowers in summer. Flowers are white, flushed yellow at the base.

It has long been cultivated, but is susceptible to virus diseases of lilies, and to Botrytis fungus. One possible way to avoid problems with viruses is to grow plants raised from seed.

Gallery

Madonna Lilies in art and culture

The Madonna lily is often described as being the basis of the fleur de lis, though the shape of this stylised flower more strongly resembles that of a flag iris.