Castilleja is a genus of flowering plants commonly known as Indian paintbrush. These plants are native to North America and are often found in meadows, grasslands, and open forests. They are characterized by their bright, tubular flowers that can be red, orange, yellow, or pink, attracting various pollinators like bees and butterflies. The plants are hemiparasitic, meaning they can photosynthesize but also obtain nutrients and water from the roots of nearby plants. Castilleja species play an important role in their ecosystems, contributing to soil health and providing habitat for wildlife.