Geranium pollen. (Martin Oeggerli / ZUMA Press)

Venus flytrap pollen. (Martin Oeggerli / ZUMA Press)

Acanthus pollen. (Martin Oeggerli / ZUMA Press)

Willow pollen. (Martin Oeggerli / ZUMA Press)

Silver leaf oak pollen. (Martin Oeggerli / ZUMA Press)

Pine pollen. (Martin Oeggerli / ZUMA Press)

Silk tree pollen. (Martin Oeggerli / ZUMA Press)

Alder pollen. (Martin Oeggerli / ZUMA Press)

Behind the images. (Martin Oeggerli / ZUMA Press)

Pistia pollen. (Martin Oeggerli / ZUMA Press)

Quince pollen. (Martin Oeggerli / ZUMA Press)

White clover pollen. (Martin Oeggerli / ZUMA Press)

White clover pollen. (Martin Oeggerli / ZUMA Press)

Snowball plant pollen. (Martin Oeggerli / ZUMA Press)