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词汇 umbel
释义

Definition of umbel in English:

umbel

noun ˈʌmb(ə)lˈəmbəl
Botany
  • A flower cluster in which stalks of nearly equal length spring from a common centre and form a flat or curved surface, characteristic of the parsley family.

    〔植〕伞形花序

    Example sentencesExamples
    • Ginseng plants with three or more leaves, or rarely two leaves, produce an umbel of small white flowers between late May and July.
    • Plants produce one or more stems bearing umbels of 10-25 greenishwhite flowers (Shannon and Wyatt 1986a).
    • Unlike other Liliales, these vines produce their flowers in spherical clusters called umbels, as in the picture of Bomarea at the top of this page.
    • During field harvest, each plant was separated into leaves (blade + petiole), roots, stems, and umbels (pedicels + rays + flowers/fruits).
    • It is traditionally classified alongside Bupleurum, differentiated by its white flowers, sessile umbels, and conspicuous calyx teeth, and the lack of bracteoles and of a carpophore (mericarps do not separate).
    • To minimize competition for resources between developing fruits, treatments were performed on separate umbels, regardless of how many extra flowers per umbel were produced.

Derivatives

  • umbellate

  • adjective ˈʌmbəleɪt
    Botany
    • These are blooming on small plants with 3’ long umbellate flowers heavily spotted with red-maroon, with a red-purple lip.
      Example sentencesExamples
      • Agapanthus is a very variable genus, yet they are all broadly similar in appearance, with rhizomatous roots, strap-like leaves and an umbellate inflorescence on a stalk held above the leaves.
      • Milkweed fruits would in pairs (each flower produces 2), on stalks, and almost always in umbellate inflorescences rather than on something spicate like yours looks.
      • When conditions are favorable the plant produces a single, thick stem that contains hundreds of yellow umbellate flowers producing numerous seeds per umbellate.
  • umbellule

  • adjective-ˈbɛljuːl
    Botany

Origin

Late 16th century: from obsolete French umbelle or Latin umbella 'sunshade', diminutive of umbra (see umbra).

Rhymes

bumble, crumble, fumble, grumble, humble, jumble, mumble, rough-and-tumble, rumble, scumble, stumble, tumble

Definition of umbel in US English:

umbel

nounˈəmbəlˈəmbəl
Botany
  • A flower cluster in which stalks of nearly equal length spring from a common center and form a flat or curved surface, characteristic of the parsley family.

    〔植〕伞形花序

    Example sentencesExamples
    • It is traditionally classified alongside Bupleurum, differentiated by its white flowers, sessile umbels, and conspicuous calyx teeth, and the lack of bracteoles and of a carpophore (mericarps do not separate).
    • Unlike other Liliales, these vines produce their flowers in spherical clusters called umbels, as in the picture of Bomarea at the top of this page.
    • During field harvest, each plant was separated into leaves (blade + petiole), roots, stems, and umbels (pedicels + rays + flowers/fruits).
    • Ginseng plants with three or more leaves, or rarely two leaves, produce an umbel of small white flowers between late May and July.
    • Plants produce one or more stems bearing umbels of 10-25 greenishwhite flowers (Shannon and Wyatt 1986a).
    • To minimize competition for resources between developing fruits, treatments were performed on separate umbels, regardless of how many extra flowers per umbel were produced.

Origin

Late 16th century: from obsolete French umbelle or Latin umbella ‘sunshade’, diminutive of umbra (see umbra).

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