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
An umbel is an inflorescence which consists of a number of short flower stalks (called pedicels) which are equal in length and spread from a common point, somewhat like umbrella ribs. Umbels can be simple or compound.
例句与用法
1.
Flowers hermaphrodite , small , white , arranged in compound umbels 花杂性，小，白色，排成复伞形花序。
2.
African plant with bright green evergreen leaves and umbels of many usually deep violet - blue flowers 非洲的一种植物，具有明亮的绿色常青叶和有深紫绿色花构成的伞状花序。
3.
European vetchlike herb naturalized in the eastern united states having umbels of pink - and - white flowers and sharp - angled pods 一个欧洲产的巢菜状草本植物，已在美国东部归化，具有粉红及白色花，成伞形花序及锐棱荚果。
4.
Primula merriiliana is a small plant of biennial , rosette herbs with pinnately dissected leaves . the flowers are borne on leafless scapes in umbellate inflorescences , which are arranged in the form of 1 - 3 level of the umbels . they are often heterostylous , whereas p . cicutarrifolia is different from the former in having homomorphic flowers , one level of umbel , and the eroded tepals 安徽羽叶报春为具异型花、花序1 - 3层，叶羽状深裂的二年生小草本植物，毛茛叶报春为具同型花、伞形花序1层、叶羽状深裂的二年生小草本植物，两物种都在第一年八月开始萌发幼苗，第二年七月结束其生活史。
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