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An umbel is an inflorescence which consists of a number of short flower stalks (called pedicels) which spread from a common point, somewhat like umbrella ribs. The word was coined in botany in the 1590s, from Latin umbella "parasol, sunshade."[1] The arrangement can vary from being flat topped to almost spherical. Umbels can be simple or compound. The secondary umbels of compound umbels are known as umbellules or umbellets.[2] A small umbel is called an umbellule.[2] The arrangement of the inflorescence in umbels is referred to as umbellate, or occasionally subumbellate (almost umbellate).
Umbels are a characteristic of plants such as carrot, parsley, dill, and fennel in the family Apiaceae; ivy, aralia and fatsia in the family Araliaceae; and onion (Allium) in the family Alliaceae.
An umbel is a type of indeterminate inflorescence.[2][3] A compressed cyme, which is a determinate inflorescence, is called umbelliform if it resembles an umbel.
Compound umbel of a hemlock-parsley, Conioselinum pacificum (Apiaceae)
Umbel of a wild carrot, Daucus carota (Apiaceae)
An umbel of Fatsia japonica (Araliaceae)
Involucrate umbels of Primula veris.
Umbel, Fruit, Raceme, Botany, Plant ecology
Apium, Anise, Umbel, Apiales, Angelica
Inflorescence, Cordyline, Yucca, Aloe, Agapanthus