Adenanthos is an genus of Australian native shrubs in the flowering plant family Proteaceae. Variable in habit and leaf shape, it is the only Proteaceae genus in which solitary flowers is the norm. It was discovered in 1791, and formally published by Jacques Labillardière in 1805. There are now 33 species recognised. The genus is placed in subfamily Proteoideae, and is held to be most closely related to several South African genera.
Endemic to Australia, its centre of diversity is southwest Western Australia, where 31 species occur. The other two species occur in South Australia and western Victoria (Australia). They are mainly pollinated by birds.