This cluster of flowers is also known as a corymb.

Flower

This cluster of flowers is also known as a corymb.

This cluster of flowers is also known as an umbel.

Flower

This cluster of flowers is also known as an umbel.

the Larkspur has unsymmetrical flowers.

Flower

the Larkspur has unsymmetrical flowers.

the Larkspur has unsymmetrical flowers.

Flower

the Larkspur has unsymmetrical flowers.

The flower of the Violet.

Flower

The flower of the Violet.

The flower of the Violet.

Flower

The flower of the Violet.

The corolla of the Morning Glory.

Flower

The corolla of the Morning Glory.

The calyx of the Morning Glory.

Flower

The calyx of the Morning Glory.

In the Stramonium, the five sepals are united into a cup or tube.

Flower

In the Stramonium, the five sepals are united into a cup or tube.

In the Honeysuckle the sepals fuse to form a tube.

Flower

In the Honeysuckle the sepals fuse to form a tube.

In the Harebell, the tube is wide and the border spreads like a bell.

Flower

In the Harebell, the tube is wide and the border spreads like a bell.

In Phlox, the tube spreads suddenly into a flat boder.

Flower

In Phlox, the tube spreads suddenly into a flat boder.

The stamens are united in this Lobelia.

Flower

The stamens are united in this Lobelia.

The stamens are united in this Mallow.

Flower

The stamens are united in this Mallow.

Wheel-shaped flower of Nightshade.

Flower

Wheel-shaped flower of Nightshade.

"Diagrams of inflorescence. A, panicle; B, raceme; C, spike; D, head; E, umbel." -Bergen, 1896

Inflorescence

"Diagrams of inflorescence. A, panicle; B, raceme; C, spike; D, head; E, umbel." -Bergen, 1896