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 ?
Raccoons switched to grapes (Vitis sp.) and autumn olive (Elaeagnus umbellate; 20% and 32% frequency of occurrence, respectively) in Autumn.
Carrots belong to the family Apiaceae which is characterized by having dissected leaves, umbellate inflorescences, and fruits that are schizocarps (which split into two meri carps.
Garlic is a two year-old plant with a bulb composed of a chive and direct stem and at the end has a umbellate flower with some bulbil.
Inflorescence subcylindric, simple, umbellate, sunk in the center of the rosette, 50-55 mm long (excluding the petals), 22-27 mm in diameter, 11 to 16-flowered; floral bracts entire, subobtuse and minutely apiculate, cucullate, white-hyaline except for the red apex, membranous, finely nerved, ecarinate, inconspicuously and sparsely white-lepidote inside, the outer ones subspathulate, 20-22 x 4-5 mm, equaling to slightly exceeding the ovary, the inner ones sublinear-lanceolate, acute, 15-17 x 2.5-3 mm, equaling the pedicels to slightly shorter than the ovary.
Like Abronia, Tripterocalyx produces umbellate inflorescences of salverform flowers with a showy limb and a narrow tube, which indicates that lepidopterans are likely pollinators.
Unique Characteristics: Stem is hollow and leafless with four to six trumpet-shaped florets in an umbellate pattern; florets continue to open; some cultivars have faint stripes or colors in petal margin; photo depicts large-flowered cultivar.
Efficiency of RAPD and ISSR markers system in accessing genetic variation of rice bean (Vigna umbellate) landraces.
Delandin, a chitinase-like protein with antifungal, HIV-1 reverse transcriptase inhibitory and mitogenic activities from the rice bean Delandia umbellate. Protein Expression and Purification, vol.
Based on the cladistic analysis by Anderberg (1994a) Enkianthus seems to have originally been shrubs with deciduous leaves, racemose inflorescences, camp anulate corollas, and winged seeds, whereas the more derived species possess coriaceous leaves, umbellate inflorescences, flowers with tubular or urceolate corollas, and unwinged seeds.
To attract potential pollinators, wild parsnip plants produce visual and olfactory orientation signals, as well as nectar rewards, in the form of large umbellate inflorescences (Bell, 1971; Borg-Karlson et al., 1994).
Roots are stout fleshy, whitish brown; leaves simple ovate, glabrous, those in the floral region smaller and opposite; flowers inconspicuous, greenish or lubrid-yellow, in axillary, umbellate cymes; berries small, globose, orange-red when mature, enclosed in the persistent calyx; seeds yellow, reniform.