Bottlebrushes are members of the genus Callistemon and belong to the family Myrtaceae. They are closely related to paperbark melaleucas. Callistemon species are commonly referred to as bottlebrushes because of their cylindrical, brush-like flowers, which resembles a traditional bottle brush. They are mostly found in the temperate regions of Australia, especially along the east coast.
Callistemon typically favours moist conditions. so they thrive well in a well-drained garden with regular watering. However, two species are found in Tasmania and several others in the south-west of Western Australia. Some species are known to be drought resistant and some are used for ornamental landscaping.