umbel

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umbel

an inflorescence, characteristic of umbelliferous plants, in which the flowers arise from the same point in the main stem and have stalks of the same length, to give a cluster with the youngest flowers at the centre

Umbel

 

a cluster of plants whose flower scapes are all of the same length and branch out as if from the apex of a shortened main rachis. The flowers, therefore, are located much at the same level (in cherry blossoms, primroses, and masterworts). The peripheral flowers in the umbel open first, and then the inner ones blossom. Plants frequently have compound umbels, formed by small umbels with short scapes that are located in place of flowers on long rachises that branch out from the apex of the main rachis. Such small umbels are called umbellets, and the rachises on which they sit are called rays. Compound umbels are characteristic of almost all the plants of the family Umbelliferae (carrots, dill, angelica).

umbel

[′əm·bəl]
(botany)
An indeterminate inflorescence with the pedicels all arising at the top of the peduncle and radiating like umbrella ribs; there are two types, simple and compound.
References in periodicals archive ?
At first glimpse, there is little family resemblance between astrantias and the typical umbels, with flat heads composed of myriad flowers.
Note that many members of the umbel family are herbs.
The yellow flowers, which are borne on umbels, are also edible, milder and green-tasting.
However, 93.58% of alate aphids were found on the umbels and 6.42% of alate aphids on the fennel leaves (Fig.
One to two days before nectar collection, plastic bags were placed over four male and four female umbels per field that were approximately the same size and at the same stage of bloom (Silva and Dean 2000).
Tillett (1967) and Galloway (1975) reported that some Abronia would mature anthocarps for all flowers on an umbel if even one flower on an umbel were fertilized, although most anthocarps would be empty.
Seed yield was directly correlated with most of the examined parameters, there being complex relationships involving the combined effect of number of umbels per plant, average diameter of umbels and 1000-seed mass.
One is a giant...Dill Dukat can grow to 76 cm and will make large umbels and provide large seedheads for pickles.
On these plants, four umbels that flowered sequentially were selected, and all others were removed.
One plant family that is particularly important in the garden here are the umbels. They used to be classified as the family umbelliferae but their clan has now been renamed as apiaceae.
The data were recorded on twelve characters viz., days to 50% flowering, plant height, number of basal leaves, longest basal leaf length, number of fruit bearing branches, umbels per plant, umbellets per plant, seeds per umbel, seed yield per plant, 100-seed weight, days to maturity and harvest index.