A catkin arrangement of flowers.

Catkin

A catkin arrangement of flowers.

A corymb arrangement of flowers.

Corymb

A corymb arrangement of flowers.

This Lily of the Valley forms flower clusters, or racemes.

Cluster Flower

This Lily of the Valley forms flower clusters, or racemes.

A head is a flower cluster with a short body, and without pedicles to the blossoms.

Head

A head is a flower cluster with a short body, and without pedicles to the blossoms.

A simple panicle, the branches only once branched.

Panicle

A simple panicle, the branches only once branched.

A raceme arrangement of flowers.

Raceme

A raceme arrangement of flowers.

A spathe is a bract or leaf enwrapping a spike or cluster or blossoms.

Spathe

A spathe is a bract or leaf enwrapping a spike or cluster or blossoms.

A spike arrangement of flowers.

Spike

A spike arrangement of flowers.

An umbel arrangement of flowers.

Umbel

An umbel arrangement of flowers.

Racemes clustered in racemes, making a compound raceme, or umbel as in this Caraway.

Compound Umbel

Racemes clustered in racemes, making a compound raceme, or umbel as in this Caraway.