Lily of the valley, sometimes written lily-of-the-valley, is a highly poisonous woodland flowering plant with sweetly scented, pendent, bell-shaped white flowers borne in sprays in spring. It is native throughout the cool temperate Northern Hemisphere in Asia and Europe.

Convallaria majalis is an herbaceous perennial plant that forms extensive colonies by spreading underground stems called rhizomes. New upright shoots are formed at the ends of stolons in summer, these upright dormant stems are often called pips. These grow in the spring into new leafy shoots that still remain connected to the other shoots under ground, often forming extensive colonies. The stems grow to 15–30 cm (6–12 in) tall, with one or two leaves 10–25 cm (4–10 in) long; flowering stems have two leaves and a raceme of five to fifteen flowers on the stem apex.

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