a. [ad. mod.L. umbellāt-us, f. L. umbella parasol, UMBELLA: see -ATE2. So Sw. umbellat, F. ombellé.]
1. Bot. a. Of flowers: Forming, arranged in, an umbel or umbels.
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.
1793. [see UMBELLED a.].
1807. J. E. Smith, Phys. Bot., 239. Its ultimate terminations are sometimes obscurely umbellate, especially while in blossom.
1826. Samouelle, Direct. Collect. Insects & Crust., 28. Alighting on the blossoms of trees and shrubs, and particularly on flowers of the umbellate kind.
1872. Oliver, Elem. Bot., II. 184. Common Ivy . A climbing evergreen shrub, with inconspicuous umbellate flowers.
b. Of plants: Having flowers in umbels.
1785. Martyn, Lett. Bot., v. (1794), 53. This then is the proper character of the umbellate tribe.
18227. Good, Study Med. (1829), I. 174. The umbellate order affords also a rich variety of carminatives.
2. Zool. Provided with, or forming, an umbel; umbelliferous; umbelliform.
1870. [see UMBEL 2].
Hence Umbellately adv., in umbels.
1887. Garnsey & Balfour, trans. De Barys Fungi, v. 153. A creeping endophytic mycelium and straight erect simple sporophores ending in umbellately arranged heads of basidia.