Jeff Foott / Purple Owl's Clover (Castilleja exserta) and Goldfield (Lasthenia californica) flowers, super bloom, Carrizo Plain National Monument, California

Jeff Foott / Paintbrush (Castilleja sp) flowers, Arches National Park, Utah

Jack Dykinga / Foothills of the Temblor Range, carpeted with Coreopsis (yellow) and Purple Owl's Clover (Castilleja exserta) flowers. Carrizo Plain, California, USA. 30th March 2019.

Jack Dykinga / Indian paintbrush (Castilleja sp.) flowers amid boulders in a stream, in narrow canyon with conifers in background Grand Staircase-Escalante National Monument, Utah, USA.

Tim Fitzharris / Paintbrush (Castilleja sp) and Seaside Fleabane (Erigeron glaucus) flowering on coast, Garrapata State Beach, Big Sur, California

Floris van Breugel / Paintbrush (Castilleja parviflora) flowering in withered sage bush, White Mountains, California, USA, July

Sean Crane / Hoary Marmot (Marmota caligata) feeding on Indian Paintbrush (Castilleja coccinea) flowers, Mount Rainier National Park, Washington

Rolf Nussbaumer / Texas Paintbrush (Castilleja indivisa) in field of Huisache Daisies (Amblyolepis setigera) Fennessey Ranch, Refugio, Coastal Bend, Texas Coast, USA

Rolf Nussbaumer / Close up of Texas Paintbrush (Castilleja indivisa) flowering, Fennessey Ranch, Refugio, Coastal Bend, Texas Coast, USA

Rolf Nussbaumer / Ruby-throated Hummingbird (Archilochus colubris) female feeding on flowering Texas Paintbrush (Castilleja indivisa) Fennessey Ranch, Refugio, Coastal Bend, Texas Coast, USA

Alan Watson / Alpine paintbrush (Castilleja rhexifolia) in an alpine meadow along the Rockwall trail, Kootenay National Park, British Columbia, Canada. (World Heritage Site)July 2009

Jack Dykinga / Wildflower meadow with Silvery lupin {Lupinus argenteus}, Indian paintbrush {Castilleja miniatus} and Alpine penstemon {Penstemon alpinus} Rio Grande National Forest, Colorado, USA