Globeflower, Trollius chinensis, yellow flower showing stamens and stigma.

Globeflower, Trollius chinensis, yellow flower showing stamens and stigma against a solid black background.

Globeflower, Trollius chinensis, yellow flower showing stamens and stigma.

Globeflower, Trollius chinensis, yellow flower showing stamens and stigma.

Globeflower, Trollius chinensis, yellow flower showing stamens and stigma.

Globeflower, Trollius chinensis, yellow flower showing stamens and stigma, against a solid black background.

Helen's flower, Sneezeweed, Helenium, viewed side on showing the domed central mass of stamens.

Helen's flower, Sneezeweed, Helenium, viewed side on showing the domed central mass of stamens.

Helen's flower, Sneezeweed, Helenium, viewed side on showing the domed central mass of stamens.

Helen's flower, Sneezeweed, Helenium, viewed side on showing the domed central mass of stamens.

Yarrow, Achillea filipendulina 'Gold Plate', multiple stems backlit against a clear blue sky.

Cosmos bipinnatus, shot from side revealing pollen coverd yellow stamens.