Fouquieria diguetii, known by the common names Adam's tree,palo Adán, and Baja [California] Tree Ocotillo, is a plant in the family Fouquieriaceae native to the southern half of the Baja California Peninsula, and the coasts of Sonora and Sinaloa.

It is distinguished by its bright red, tubular flowers, a shrub to small tree habit, and conical, paniculate inflorescences.

This plant is a deciduous shrub arising from a short, thick trunk with branches covered in spines.

[5] This species is named for Leon Diguet, a French naturalist who traveled throughout Baja California.

[7] There is a considerable amount of variation in the growth habit and inflorescence length over the distribution of this species.