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.

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

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

Mike Read / Alpine paintbrush (Castelleja rhexifolia) among grasses at roadside, The Grand Loop, Yellowstone National Park, Wyoming USA June

Mike Read / Sulphur paintbrush (Castilleja sulphurea) in alpine meadow near Mount Washburn, The Grand Loop Yellowstone National Park, Wyoming, USA June

Gerrit Vyn / Indian paintbrush (Castilleja) in flower in sagebrush-steppe. Sublette County, Wyoming, USA. June.

Kirkendall-Spring / Paintbrush flowers (Castilleja) in bloom, Canyon Creek Meadows below Three Finger Jack, Mount Jefferson Wilderness. Oregon.

Floris van Breugel / Mt Rainier and a lenticular cloud at sunrise with lupins (Lupinus latifolius) and pink paintbrushes (Castilleja parviflora), Grand Park, Mount Rainier National Park, Washington, USA. August 2008.

Juan Carlos Munoz / Indian paintbrush flowers (Castilleja) growing in rock face, Red Rock Canyon, Clark County, Nevada, USA, March.

Juan Carlos Munoz / Indian paintbrush flowers (Castilleja) growing in rock face, Red Rock Canyon, Clark County, Nevada, USA, March.

MYN / Krista Schlyer / Western Yellow Paintbrush (Castilleja occidentalis) Rocky Mountain National Park, Colorado, Rocky Mountain Bioblitz August 2012. Meetyourneighbours.net project

Kirkendall-Spring / Meadow flowers Indian paint brush (Castilleja miniata) and Lupins (Lupinus latifolius) blooming on Mazama Ridge in Mount Rainier National Park. Washington, USA, August 2009

Kirkendall-Spring / Indian paint brush (Castilleja miniata) and lupins (Lupinus latifolius). Washington, USA, August 2008

Jack Dykinga / Brittlebush (Encelia farinosa) and Owl's clover (Castilleja exserta) in flower amongst Saguaro cactus (Carnegiea gigantea) studded slopes, Sonoran Desert, Tonto National Monument, Arizona, USA, A...

Jack Dykinga / Brittlebush (Encelia farinosa) and Owl's clover (Castilleja exserta) in flower amongst Saguaro cactus (Carnegiea gigantea) studded slopes, Sonoran Desert, Tonto National Monument, Arizona, USA, A...

Jack Dykinga / Brittlebush (Encelia farinosa) and Owl's clover (Castilleja exserta) in flower amongst Saguaro cactus (Carnegiea gigantea) studded slopes, Sonoran Desert, Tonto National Monument, Arizona, USA, A...

Jack Dykinga / Brittlebush (Encelia farinosa) and Owl's clover (Castilleja exserta) in flower amongst Saguaro cactus (Carnegiea gigantea) studded slopes, Sonoran Desert, Tonto National Monument, Arizona, USA, A...

Jack Dykinga / Lupine (Lupinus sp.), Owl's clover (Castilleja exserta venusta) and Mexican poppies (Eschscholzia californica mexicana) in flower in meadow, Sonoran Desert National Monument, Arizona, USA, March...

Jack Dykinga / Tickseed (Coreopsis sp.) and Owl clover (Castilleja exserta) carpeting the Carrizo Plain in the foothills of the Temblor Range, Caliente Range foothills. California, USA. March.

Kirkendall-Spring / Paintbrush (Castilleja sp.) and Lupine (Lupinus sp.) flowers blooming along the Loowit Trail (#216) in the blast zone, Mount St Helens National Volcanic Monument, Cascade Mountains, Washington, USA. J...

Claudio Contreras / Indian paintbrush (Castilleja fruticosa), Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, March

Claudio Contreras / Indian paintbrush (Castilleja fruticosa), Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, March

John Shaw / Indian paintbrush (Castilleja), balsamroot (Balsamorhiza sagittata), and lupin flowers (Lupinus sp) in the Columbia River Gorge, Oregon, USA. April.

Jack Dykinga / Narrow-leaved indian paintbrush (Castilleja) flowering among backlit grasses, and Tufa formations, Mono Lake Tufa State, California, USA.L

Mike Read / Indian paintbrush (Castilleja linariaefolia) flowering on roadside bank near Signal Mountain, Grand Teton National Park, Wyoming, USA, June.