Fremontodendron californicum (Torr.) Coult.

Plants erect, 15–100 dm. Leaf blades 5–113 × 4–65 mm, base cuneate to rounded or weakly cordate. Pedicels 4–18 mm. Flowers 23–76(–100) mm diam. (pressed); sepals usually yellow, lobes sometimes red at bases and margins, gland/pit borders usually setose. Seeds usually carunculate, hairy. 2n = 40.

Dry, mostly granitic slopes, 900-1800 metres in California. It thrives on poor dry rocky soils of the foothills, where it often forms dense thickets.

Can be grown by cuttings or seedlings. Seeds needs soaking.