Coreopsis douglasii, commonly known as Douglas’ Tickseed, is an annual herb native to the coastal scrub and chaparral regions of California. It typically grows up to about 25 centimeters tall, producing one or more stems topped with erect inflorescences. The leaves of Douglas’ Tickseed are mainly basal, slightly fleshy, and adapted to its native dry conditions. The inflorescence consists of a single flower head with a rounded involucre of lance-shaped, pointed phyllaries, and blooms with bright yellow flowers that are moderately showy and attract pollinators.

Douglas’ Tickseed is valued for its drought tolerance and its ability to thrive in poor, well-drained soils, making it a suitable choice for xeriscaping and naturalistic plantings. It is often used in rock gardens, borders, and as a ground cover. It requires full sun and only moderate amounts of water once established, reflecting its adaptation to dry habitats. While it is not prone to many diseases, overwatering can lead to root rot. It is also important to note that, as an annual, it completes its life cycle in one year and relies on seed production for persistence in the garden.CC BY-SA 4.0