a. [ad. mod.L. umbellāt-us, f. L. umbella parasol, UMBELLA: see -ATE2. So Sw. umbellat, F. ombellé.]

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  1.  Bot. a. Of flowers: Forming, arranged in, an umbel or umbels.

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1760.  J. Lee, Introd. Bot., I. xix. (1765), 50. An Umbellate Flower is an aggregate one, consisting of many Florets placed on a Receptacle, on fastigiate Peduncles that are all produced from the same point.

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1793.  [see UMBELLED a.].

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1807.  J. E. Smith, Phys. Bot., 239. Its ultimate terminations are sometimes obscurely umbellate, especially while in blossom.

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1826.  Samouelle, Direct. Collect. Insects & Crust., 28. Alighting on the blossoms of trees and shrubs, and particularly on flowers of the umbellate kind.

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1872.  Oliver, Elem. Bot., II. 184. Common Ivy…. A climbing evergreen shrub, with … inconspicuous umbellate flowers.

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  b.  Of plants: Having flowers in umbels.

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1785.  Martyn, Lett. Bot., v. (1794), 53. This then is the proper character of the umbellate tribe.

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1822–7.  Good, Study Med. (1829), I. 174. The umbellate order affords also a rich variety of carminatives.

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  2.  Zool. Provided with, or forming, an umbel; umbelliferous; umbelliform.

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1870.  [see UMBEL 2].

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  Hence Umbellately adv., in umbels.

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1887.  Garnsey & Balfour, trans. De Bary’s Fungi, v. 153. A creeping endophytic mycelium and straight erect simple sporophores ending in umbellately arranged heads of basidia.

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