Wyoming State Flower: Indian Paintbrush

The Indian Paintbrush is not what it appears. The vivid red-orange color — the reason Wyoming school children wanted it as the state flower — comes not from petals but from modified leaves called bracts that surround small, greenish-yellow true flowers hidden inside. The plant grows 12 to 36 inches tall on upright stems lined with narrow leaves, and it thrives across Wyoming's diverse elevations, from the Thunder Basin grasslands at around 4,000 feet to alpine meadows above 11,000 feet in the Wind River and Bighorn ranges.

What makes the Indian Paintbrush genuinely unusual is what happens underground. The plant is hemiparasitic — its roots attach to the root systems of neighboring grasses and wildflowers and draw water and nutrients directly from them, while also performing its own photosynthesis. It can survive in poor, well-drained rocky or sandy soil that would struggle to sustain other flowering plants, partly because it is, in a quiet biological sense, drawing on its neighbors. Hummingbirds are the primary pollinators, using long beaks to reach nectar inside the tubular flowers that bees cannot easily access. Peak bloom runs July through August across most of Wyoming.

Over a dozen Castilleja species grow in Wyoming, displaying variations from scarlet red to orange, yellow, and pink. Castilleja linariifolia — the species designated as the state flower — is the most common across the state's plains and foothills and the one most Wyomingans recognize immediately.

Castilleja linariifolia honors two botanical references. The genus Castilleja was named for Domingo Castillejo, an 18th-century Spanish botanist; linariifolia describes the plant's narrow leaves, which resemble those of toadflax (Linaria). The plant belongs to the Orobanchaceae family, a group of roughly 2,000 species of parasitic and hemiparasitic plants found worldwide.

The common name carries a different origin. Native American legend describes a young artist who tried to paint the colors of a Wyoming sunset and failed. He asked the Great Spirit for help, and brushes already dipped in sunset colors appeared before him. Where he left those brushes on the ground, the flowers grew. The image of a brush dipped in flame-colored paint is obvious once you've seen a paintbrush spike in bloom.

Regional names include painted cup, prairie fire, and Wyoming paintbrush. The Shoshone and Arapaho peoples knew the plant under different names in their own languages. Wyoming's designation is broad enough to include multiple Castilleja species, though linariifolia is the one most closely associated with the official emblem.

The Wyoming Legislature adopted the Indian Paintbrush as the official state flower on January 31, 1917 — a designation driven not by legislators but by the state's school children, who had campaigned for the wildflower they saw every summer across the plains and mountain slopes. The flower's vivid red-orange matched Wyoming's landscape and frontier character, later reflected in Wyoming's state flag symbolism.

The Indian Paintbrush was the kind of symbol that required no debate. It bloomed in every county, at every elevation, from the prairie grasslands of the east to the alpine meadows of the Tetons and the Bighorns. Ranchers, homesteaders, and schoolchildren all recognized it. Its vibrant spikes stood out against the gray-green of Wyoming's sagebrush flats in a way that few other native plants could match, and it grew alongside Wyoming's state bird territory across the same open landscapes.

More than a century later, the designation holds without revision. Indian Paintbrush remains one of Wyoming's most photographed native wildflowers and the one most visitors associate with Wyoming's high-country summers.

The Indian Paintbrush has been connected to Wyoming's frontier identity for over a century — a wildflower that thrives across harsh elevations, poor soil, and arid conditions that defeat most flowering plants. Its resilience comes partly from biology: by drawing on the root systems of neighboring plants, it survives where it otherwise could not. That quiet self-reliance paired with spectacular color reads, in Wyoming's cultural imagination, as something close to the state's own character — independence that is real but not isolated, adapted to one of the most demanding landscapes in the American West.

The flower's red-orange color anchors it to Wyoming's most iconic visual experiences: the dramatic light of its big-sky sunsets, the rust and sienna of its canyon walls, the warmth of its autumn aspen country. For a state that has no official color designation, the Indian Paintbrush does more visual work as a color symbol than most state flowers do — its hue is Wyoming's hue, in a way that is difficult to disentangle from landscape and legend.