um·bel /ˈʌmbəl/
傘狀花序,傘形花序
Um·bel n. Bot. 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.
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umbel
n : flat-topped or rounded inflorescence characteristic of the
family Umbelliferae in which the individual flower stalks
arise from about the same point; youngest flowers are at
the center