Wyoming Paintbrush

castilleja linariifolia

The Wyoming Paintbrush, also known as the linaria-leaved paintbrush, is a striking perennial wildflower famed for its vibrant, fiery-red to orange-yellow display. It is the proud state flower of Wyoming, widely celebrated for its ability to illuminate dry, rocky plains and mountain slopes. Uniquely adapted to arid conditions, this plant is hemiparasitic, meaning it produces its own energy via photosynthesis but actively taps into the root systems of neighboring plants, such as sagebrush, to steal water and vital nutrients.

Habitat: Found in dry, open plains, rocky foothills, and pinyon-juniper woodlands, often growing in close association with sagebrush shrubs.

Appearance

This erect perennial grows between 30 and 100 cm tall, featuring sparse, slender, linear leaves that are deeply divided into narrow segments. The true flowers are tube-shaped and greenish-yellow, but they are mostly hidden by highly prominent, deeply lobed, scarlet-to-orange bracts that mimic brilliant blossoms. Its stems are often purplish-green and hairless to slightly hairy, terminating in showy, brush-like spikes that instantly catch the eye in dusty landscapes.

KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderLamialesFamilyOrobanchaceaeGenusCastilleja

Wyoming Paintbrush

Interesting facts

It was adopted as the official state flower of Wyoming on January 31, 1917, beating out other popular candidates like the columbine.

Native American tribes historically used the paintbrush as a condiment, love potion, and medicinal treatment for various ailments, though the plant can accumulate toxic levels of selenium from the soil.

The genus name 'Castilleja' honors Domingo Castillejo, an 18th-century Spanish botanist and instructor.

Special abilities

It utilizes specialized underground structures called haustoria to invade the roots of host plants, siphoning off water, nitrogen, and minerals to survive harsh droughts.

Instead of investing energy into large petals, it employs brightly colored leafy bracts to efficiently attract avian pollinators while retaining tough photosynthetic tissue.

Its narrow, thread-like leaves reduce surface area, significantly minimizing moisture loss through transpiration in arid environments.

Measurements & details

Length: 30-100 cm
Lifespan: 3-8 years

Diet & Feeding

As a hemiparasite, the Wyoming Paintbrush produces carbon sugars through its own photosynthesis, but supplements its water and mineral needs by tapping the roots of nearby host plants.

Primary Foods

Water and dissolved minerals from host roots
Atmospheric carbon dioxide
Sunlight
Soil nutrients via secondary root systems

Foraging Method

Parasitic Connectioning Via Haustoria To Host Plants, Primarily Sagebrush Or Pine Roots.

Ecological connections

host plant

Big Sagebrush

Artemisia tridentata

The paintbrush taps into the root system of big sagebrush to extract essential moisture and minerals.

mutualism

Broad-tailed Hummingbird

Selasphorus platycercus

Broad-tailed hummingbirds are major pollinators of this plant, attracted by the bright red color of the bracts.

eaten by

Edith's Checkerspot

Euphydryas editha

The caterpillars of Edith's Checkerspot butterfly feed on the leaves and flowers, absorbing protective defensive chemicals from the plant.

Traits

No trait badges are assigned for this object yet.

Also known as

No aliases listed yet.

Collections

Collections for this object will appear here as more themes are added.

Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Wyoming Paintbrush?

The easiest way to identify Wyoming Paintbrush is to use the Snappit nature identifier app.

How long is Wyoming Paintbrush?

30-100 cm

How long does Wyoming Paintbrush live?

3-8 years

What does Wyoming Paintbrush eat?

As a hemiparasite, the Wyoming Paintbrush produces carbon sugars through its own photosynthesis, but supplements its water and mineral needs by tapping the roots of nearby host plants.

Where is Wyoming Paintbrush usually found?

Found in dry, open plains, rocky foothills, and pinyon-juniper woodlands, often growing in close association with sagebrush shrubs.

How does Wyoming Paintbrush hunt?

Parasitic Connectioning Via Haustoria To Host Plants, Primarily Sagebrush Or Pine Roots.