Jack Dykinga / Close up of flowering Sand verbena (Abronia) and Birdcage evening primrose (Oenothera deltoides) Anza-Borrego State Park, California, USA. March 2017. These plants are flowering during on largest 'su...

Jack Dykinga / Flowering Sand verbena (Abronia) and Birdcage evening primrose (Oenothera deltoides) close up, Anza-Borrego State Park, California, USA. March 2017. These plants are flowering during on largest 'supe...

Jack Dykinga / Whipple Mountain foothills, with flowering Notch-leaf scorpion-weed (Phacelia crenulata) and Heartleaf evening primrose (Camissonia cardiophylla) with the Riverside and Big Maria Mountains in the back...

Jack Dykinga / Desert landscape with flowering Sand verbena (Abronia), Desert gold (Geraea canescens), and Birdcage evening primrose (Oenothera deltoides), with the Santa Rosa Mountains in background. Anza-Borrego...

Jack Dykinga / White flowering birdcage evening primrose (Oenothera deltoides) and yellow evening primrose (Oenothera primiveris), Cabeza Prieta National Wildlife Refuge, Arizona. February 2014.

Jack Dykinga / Night blooming birdcage evening primrose (Oenothera deltoides) with the Sheep Hole Mountains in the background at sunset, BLM (Bureau of Land Management) land, Mojave Desert, California. March 2014.

David Noton / Autumnal foliage of Fireweed (Epilobium angustifolium) Kluane National Park, Yukon Territories, Canada, September.

Fergus Gill / 2020VISION / Whitethroat (Sylvia communis) with insect prey, perched on Rosebay willowherb (Epilobium angustifolium), Perthshire, Scotland, UK, June.

Paul Harris / 2020VISION / Rosebay Willowherb (Chamerion angustifolium angustifolium), with Combine harvester harvesting Oats in the background, Haregill Lodge Farm, Ellingstring, North Yorkshire, England, UK, August.

Guy Edwardes / Arctic River beauty (Chamerion latifolium) flowering, Landmannalauger, Iceland, June

Guy Edwardes / Arctic River beauty (Chamerion latifolium) flowering, Landmannalauger, Iceland, June

Wild Wonders of Europe / Bartocha / Fireweed (Chamerion angustifolium angustifolium) in flower at night, Thy National Park, Denmark, July 2009