Castilleja peckiana, commonly known as Peck's Paintbrush, is a striking herbaceous perennial belonging to the Orobanchaceae family. This species is recognized for its vibrant, often brightly colored bracts that surround its less conspicuous flowers, a characteristic common to many members of the *Castilleja* genus, often referred to as Indian paintbrushes. Its significance lies in its unique ecological role and its contribution to the biodiversity of its native habitats. Peck's Paintbrush typically exhibits an erect to spreading growth habit, reaching heights of approximately 20 to 60 centimeters. The stems are slender and often branched, arising from a woody base. Its leaves are generally linear to lanceolate, with entire margins, and are arranged alternately along the stem. The foliage can vary in color from green to grayish-green, sometimes with a slightly hairy texture. The most visually arresting feature of *Castilleja peckiana* is its inflorescence. The true flowers are tubular and often greenish or yellowish, but they are largely concealed by brightly colored, petal-like bracts. These bracts are typically scarlet, crimson, or sometimes shades of orange or pink, giving the plant its common name and a distinctive ornamental appeal. The plant produces a capsule fruit that contains numerous small seeds. The native range of *Castilleja peckiana* is primarily within the western United States, with specific populations found in Oregon and California. It thrives in a variety of open, well-drained habitats, often preferring serpentine soils, which are rich in magnesium and iron and can be challenging for many plants. These serpentine areas are frequently characterized by sparse vegetation, rocky outcrops, and exposure to full sun. Peck's Paintbrush is well-adapted to these xeric conditions, often found in meadows, open woodlands, and along roadsides within its natural distribution. Cultivation requirements generally mirror its natural habitat: full sun, excellent drainage, and lean, well-drained soils. It is particularly suited to rock gardens and native plant landscapes where its unique aesthetic can be appreciated. Ecologically, *Castilleja peckiana* plays an important role in its native ecosystems. Like other hemiparasitic plants in the *Castilleja* genus, it can derive some nutrients and water from the root systems of host plants, although it also possesses chlorophyll and can photosynthesize independently. This parasitic or hemiparasitic nature influences the plant communities in which it grows. Its vibrant bracts are thought to attract pollinators, contributing to the reproductive success of both the paintbrush and other flowering plants in the vicinity. While not typically cultivated for medicinal or culinary purposes, its ornamental value is significant for those interested in native flora and specialized garden designs. An interesting characteristic of Peck's Paintbrush, shared with many related species, is its ability to thrive in nutrient-poor and often toxic serpentine soils. These soils typically inhibit the growth of most plants due to high levels of heavy metals and a skewed nutrient ratio. *Castilleja peckiana*'s adaptations allow it to colonize these challenging environments, making it an indicator species for serpentine ecosystems and a valuable component of their unique biodiversity. The bright coloration of its bracts is a testament to evolutionary pressures, likely serving to maximize pollinator attraction in open, often visually complex landscapes.