Fremontodendron mexicanum is a rare species of shrub in the mallow family known by the common names Mexican flannelbush, Mexican fremontia, and Southern flannelbush, that is endemic to the central Peninsular Ranges in Mexico and the United States.

The shrub grows generally on alluvial plains, in California montane chaparral and woodlands and temperate coniferous forest habitats, among Tecate cypress (Cupressus forbesii) trees.

[4] The leathery and furry olive green leaves are up to 5 centimeters long and divided into several wide lobes.

The showy flowers are made up of five bright orange sepals and have no true petals.

[5][6] Cultivated plants need good drainage, and no supplemental summer water when established.