Gary K. Smith / Echinacea purpurea 'Lustre Hybrids' and Helenium 'Sahin's Early Flower' -in front of traditional beehive in cottage garden, summer.

Nick Upton / Sneezewort (Achillea ptarmica) flowering on the edge of a marshy area by a small heathland stream, Corfe Common, Dorset, UK, July.

Nick Upton / Sneezewort (Achillea ptarmica) flowering on the edge of a marshy area by a small heathland stream, Corfe Common, Dorset, UK, July.

Adrian Davies / Agapanthus (Agapanthus) and Helenium (Helenium) flowers in a border, Cornwall, England, UK, July.

Jack Dykinga / Flowering Sneezeweed grows along seasonal stream, Apache-Sitgreaves National Forest, after devastation of the 'Wallow Fire', Arizona, USA August 2011

Marie Read / Black-tailed Prairie Dog (Cynomys ludovicianus), young animal feeding amid a carpet of yellow sneezeweed flowers, Wichita Mountains National Wildlife Refuge, Oklahoma, USA

Tim Fitzharris / Paintbrush (Castilleja sp) and Orange Sneezeweed (Hymenoxys hoopesii) flowers in Governor Basin, Colorado

Tim Fitzharris / Orange Sneezeweed (Hymenoxys hoopesii) and Smooth Aster (Aster laevis) wildflowers in meadow with Gothic Mountain in distance, Colorado

Tim Fitzharris / Orange Sneezeweed (Hymenoxys hoopesii) and Delphinium (Delphinium staphisagria) meadow in American Basin, Colorado

Tim Fitzharris / Orange Sneezeweed (Hymenoxys hoopesii) and Delphinium (Delphinium staphisagria) in American Basin, Colorado

Tim Fitzharris / Orange Sneezeweed (Hymenoxys hoopesii) and Indian Paintbrush (Castilleja miniata) wildflower meadow looking towards Mount Sneffels Wilderness, Yankee Boy Basin, Colorado

Tim Fitzharris / Orange Sneezeweed (Hymenoxys hoopesii) and Indian Paintbrush (Castilleja miniata) beside stream, Yankee Boy Basin, Colorado