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.

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

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

Tim Fitzharris / Pointed Phlox (Phlox cuspidata) and Indian Paintbrushes (Castilleja miniata) in bloom, Hill Country, Texas

Tim Fitzharris / Paintbrush (Castilleja sp) and the Organ Rock, Arches National Park, Utah

Tim Fitzharris / Sand Bluebonnet (Lupinus subcarnosus) and Paintbrush (Castilleja sp) flowers, Hill Country, Texas

Phil Savoie / Indian paintbrush (Castilleja angustifolia) flower, Beaverhead National Forest, Montana, USA. July.

Heather Angel / Texas bluebonnets (Lupinus texensis) and Indian paintbrush (Castilleja coccinea) amongst wildflowers in ditch beside byway. Rains triggered germinaton of annual seeds. Cuero, Texas, USA. April.

Jouan Rius / Indian paintbrush in flower (Castilleja coccinea), Capitol Reef National Park, Utah, USA, April.

Alex Hyde / (Castilleja irasuensis) flowering next to the crater rim of Volcano Irazu, 3400m. Costa Rica