[1][2][3] Helianthus californicus is an erect perennial herb growing from a network of tough, woody roots with small rhizomes.

It is a sprawling, gangly plant, sending a thin stem to heights between one and three meters (3–10 feet) or more.

The lance-shaped leaves may be 20 centimeters (8 inches) long and are smooth or slightly toothed along the edges.

Each head is supported by a base covered in long, pointed phyllaries that bend back as the head ages and develops fruit.

The flower head has a fringe of golden yellow ray florets, each two to three centimeters (3⁄4–1+1⁄4 in) long, and a center filled with curly yellow and brown disc florets.