Umbel

Umbel is a type of inflorescence that is characteristic of plants in the family Apiaceae, also known as the carrot or parsley family. The term 'umbel' is derived from the Latin word 'umbella', meaning 'a parasol', which reflects the umbrella-like shape of this type of inflorescence.

Structure and Function

An umbel consists of a number of short flower stalks (or pedicels) which originate from a common point. This arrangement makes the flowers appear as if they are at the same height. The main stem of the umbel, from which the pedicels arise, is called the peduncle.

Umbels can be simple or compound. A simple umbel consists of a single layer of pedicels, while a compound umbel has a secondary layer of pedicels originating from the ends of the primary pedicels.

The structure of the umbel is advantageous for the plant as it exposes the flowers to as many pollinators as possible. The flat or slightly convex shape of the umbel also provides a landing platform for insects.

Examples of Plants with Umbels

Many plants in the Apiaceae family have umbel inflorescences. These include well-known species such as carrot (Daucus carota), parsley (Petroselinum crispum), and dill (Anethum graveolens). Some species in other families, such as the Araliaceae (the ivy family), also have umbel-like inflorescences.

See Also

• Inflorescence
• Apiaceae
• Flower