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 ?
Based in Austin, Texas, with offices in Dallas, the company will be overseen by a board with representation from both MVPindex and Umbel. MVPindex CEO Stan Woodward has been named CEO.
And Umbel's Audience Reach Extension tool can take that data segment even further--through a partnership with marketing technology company Acxiom and with the help of its own patent-pending Digital Genome audience analysis technology, Umbel can take an advertising campaign past the scope of Facebook, Twitter, and LinkedIn's off-the-shelf retargeting capabilities.
Sowing date had highly significant effect on Number of seed in umbel (p < 0.01).The means of this trait in first sowing date (10 may) was 119.6 and in second sowing date number of seed in umbel was 129.4 but in third sowing date (30 may) this trait was significantly decrease to 67.7 (Table 3).
2: Number of onion seeds per umbel per field versus number of honey bee umbel (flower) visits per 5-minute observation, Yolo and Sacramento counties, 2009.
These plots were established in August 2001 for a monitoring study of Huachuca water umbel (P.
The umbel diameter showed a similar trend, with values decreasing (from 4.1-3.3 cm) from [D.sub.1] to [D.sub.5].
The Partners project is conserving Cottonwood Spring for two endangered species, the Gila topminnow (Poeciliopsis occidentalis occidentalis) and Huachuca water umbel (Lilaeopsis schaffneriana recurva), along with the Huachuca springsnail (Pyrgulopsis thompsoni), a candidate species.
During its development, the parsnip webworm spins copious amounts of silk with which it binds together umbellets within an umbel. The parsnip webworm spends its entire larval life within its web consuming flowers and fruits; frass accumulates in the web during this period.
When Nantes and Imperator are grown for seed in a hot, dry climate like the research team's central California study site, they need about 22 to 25 inches of water from the time they are planted until seed from the almost-white, umbrella-shaped king umbel - the uppermost flower cluster atop the seed stalk - and lesser umbels beneath it matures.
The percentage of flowers maturing fruits decreases as flower number per umbel increases (Willson and Rathcke 1974; Willson and Price 1977).
Tenders are invited for Design,Construction,testing & commissioning of 100 KL RCC OGR and its compound wall Construction of pump house and compound wall, Laying of GI and HDPE pipe line installation pumping unit Internal electrification of pump house and FIVE YEARS MAINTENANCE for PWS to Umbel GP.Umbel under Lamtaput Block in the District of Koraput under BASUDHA PROG.