Fremontodendron is a genus of flowering plants in the family Malvaceae. It is commonly known as flannel bush due to its soft, hairy leaves, but there are also other words used to refer to this plant. Some common synonyms for Fremontodendron include California flannel flower, mountain mahogany, and slippery elm. These names reflect the plant's natural habitat in California and its physical characteristics, such as its flannel-like leaves and resemblance to the mahogany tree. Regardless of the name used, Fremontodendron is a beautiful and unique plant that adds interest and texture to any garden.