The flannelbush or flannel bush is a genusFremontodendron (or Fremontia) of two species of shrubs from the western United States and northern Mexico. Their leaves have a leathery and fuzzy texture reminiscent of flannel (thus the name), and the yellow and orange flowers are large and showy. The genus was named after John C. Fremont.
The hairs of the leaves and young shoots can cause skin irritation.
There are two species: the California flannelbush F. californicum, and the Mexican flannelbushF. mexicanum, and a number of populations of uncertain status. In addition, a number of hybrid cultivars have been produced, including 'California Glory', 'Ken Taylor', and 'Pacific Sunset'.
Fremontodendron mexicanum is a small tree or shrub 1.5-6 m (5-19 ft) tall with evergreen, palmately (leaflets radiating from one point)lobed leaves 25-50 mm (1-2 in) wide.
Fremontodendron mexicanum is distinguished from F. californicum by its orange sepals with basal pits generally lacking long hairs, and shiny fl, glabrous (smooth) seeds that lack caruncles (outgrowths) (Kelman 1991).
Fremontodendron mexicanum is associated with closed-cone coniferous forest dominated by Cupressus forbesii and with mixed chaparral.