Cotula coronopifolia --- Brass Buttons --- Asteraceae
A population of these small, annual plants.

Cotula coronopifolia --- Brass Buttons --- Asteraceae
Inflorescence, a discoid head.

Cotula coronopifolia --- Brass Buttons --- Asteraceae
Close-up of head (capitulum).

Cotula coronopifolia --- Brass Buttons --- Asteraceae
Extreme close-up. Note that corollas are 4-merous, unusual among the composites.

Pronunciation