Fremontodendron, with the common names fremontia[1] and flannelbush or flannel bush, is a genus of three known species of shrubs native to the Southwestern United States and northwest Mexico.

The genus Fremontodendron was named in dedication to John C. Frémont,[4] who first collected it during an 1846 expedition to Alta California.

The leaves have a leathery and fuzzy texture reminiscent of flannel (hence the name), and the yellow to orange flowers are large and showy.

They are valued for their bright yellow flowers, produced over a long period on a rapidly growing shrub or small tree.

The three species and varied hybrids/cultivars are used in native plant, water-conserving, and wildlife gardens in California.