The botanical term denotes an umbel inflorescence.
In the umbel, the main axis of the inflorescence is shortened so that all flower-bearing secondary axes begin together at the forefront of stem axis. The minor axes have approximately all the same length, so that thus the petals and fruit later come to lie on the same level. To some extent, the end of the shoot tip on which branch the flower stalks, surrounded by a ring of bracts, this phenomenon is called involucre or plain envelope. Among the plants with umbel flowers include, for example, the Araliaceae ( Araliaceae ), with ivy as a known type, the flowering rush has doldige inflorescences on.
Astrantia with flashy Involucrum
Externally similar to appear more inflorescences as screen grape, corymb and Trugdolde. The axes are side branches differently, but also result in a more or less uniform screen of flowers, so that the first act like a true umbel, and are collectively referred to as pseudo- umbels.
Springing the side branches do not produce flowers, but more clusters, called umbels umbellules or second order, it is called a compound umbel. The umbellules can a shell, then called Hüllchen have. The Umbelliferae, among them such well-known species such as carrot and celery, usually do not wear simple umbels but mostly double umbels.
Giersch ( Aegopodium podagraria )
Parsnip ( Pastinaca sativa)
Wild carrot (from below) (Daucus carota subsp. Carota)
With hops, the female inflorescences are colloquially referred to as clusters, although this is by ear.