These are daisylike wildflowers usually having blue to purple or white ray flowers with yellow centers of disc florets.

Each head contains a center of yellow disc florets, some of which bear prominent white stigmas and white pollen.

The sticky, glandular flower head has a center of several disc florets surrounded by a few white, yellow, or red ray florets.

The head has a yellow center of disc florets and white, pink, or bicolored ray florets around the edge.

Each has a center of yellow disc florets and several yellow ray florets up to 3 centimeters long.

From the involucre bloom about 8 golden ray florets around a center of hairless disc florets.

The head has a center of yellow disc florets and a fringe of ray florets which may be blue, purple, or pink.

Each has a few three-lobed yellow ray florets around a center of yellow disc florets.

The flower head contains many pale violet to nearly white ray florets and a center of yellow disc florets.

The head contains many purple ray florets between 1 and 2 centimeters long around a center of yellow disc florets.