Callistemon rigidus, commonly known as Stiff Bottlebrush, is an evergreen shrub native to a variety of habitats in eastern Australia, including coastal heath, forest margins, and inland riparian zones. It typically grows to 3 meters (10 ft) tall and is characterized by its narrow, lance-shaped leaves with a rigid point and its striking red flower spikes that appear in late spring or early summer. The bark is grey, hard, and fibrous, adding to the plant’s textural interest. The flowers, predominantly red but occasionally green, are arranged in cylindrical spikes at the branch tips and sides, which continue to grow post-flowering. These spikes are quite showy and attract pollinators, especially birds. After the flowering period, woody capsules form, containing seeds that can persist on the plant for years.

Stiff Bottlebrush is valued for its vibrant flowers and ability to attract wildlife, making it a desirable addition to gardens focused on biodiversity. It is a hardy plant that adapts well to various soil types, though it prefers full sun exposure. Its drought tolerance and resistance to pests, such as sawfly larvae, make it a low-maintenance choice for gardeners. It is often used in urban landscaping, as a specimen plant, or for naturalistic plantings. While it generally requires medium water and well-drained soil, it can tolerate less-than-ideal conditions once established. The Royal Horticultural Society has recognized it with the Award of Garden Merit, indicating its value in cultivation.CC BY-SA 4.0