Determinate Inflorescences

An umbel can be determinate or indeterminate, with a flat or rounded top. The pedicels of flowers are attached to a common point on the peduncle. Umbels may be simple or compound. Compound umbels are the typical inflorescence of most members of the carrot family (Apiaceae). Examples include onion, carrot, and dill.

A cyme is a branching inflorescence with individual flowers at the end of each branch. A simple cyme is determinate, with a grouping of three flowers on a peduncle. The central flower matures first. Examples include champions and some of the anemones. A compound cyme is composed of two or more cymes together. Examples include chick-weed and phacelia.

John F. Logue

See also: Angiosperm cells and tissues; Angio-sperm evolution; Angiosperms; Flower structure; Flower types; Flowering regulation; Garden plants: flowering; Pollination; Shoots; Stems.

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