(n.) A kind of flower cluster in which the flower stalks radiate from a common point, as in the carrot and milkweed. It is simple or compound; in the latter case, each peduncle bears another little umbel, called umbellet, or umbellule.
Example Sentences:
(1) It was found in the proposed model of morphogenesis of Acetabularia that the number of whorls N (as well as the number of umbel rays) depends on the degree of mechanical instability of the deforming cell wall (the greater is instability, the higher is the value N).
(2) Nitrogen fertilization gave higher number of compound umbels and increased oil percentage, seed yield and oil yield with increase in dose.
(3) A living, ammonia-obligate, umbellate form, similar to the Precambrian microfossil Kakabekia umbellata Barghoorn, has been isolated from two soil specimens collected at Harlech, Wales.
(4) dauricine and polysaccharide of pore umbellate as group I.
(5) Morphologically, ginseng is a perennial herb with fleshy root, a single annual stem bearing a whorl of palmately compound leaves, and a terminal simple umbel of small 5-merous flowers.
(6) The compound umbels per plant increased as the distance between plants increased.
(7) When the dendrite reaches layer II it bursts into an umbel of rapidly tapering branches.
(8) An ontogeny is proposed in which the stalk and basal bulb of the complete umbellate structure are assumed to be part of the reproductive appartus.
(9) These results show that dauricine and polysaccharide of pore umbellate did not strengthen the antiviral effect of Ara-A.
(10) As it could be expected from the high prevalence of adults with antibody (95%), 90% of umbelical cord sera have h.ia.,, Over 50% of children 15 days-3 months of age are still positive and afterwards the positivity decreases progressivley till a minimum of 8% in children 10--12 months old.
(11) Early sown plants produced taller plants, with higher compound umbels.