It is a genus of around 170 species in the plant family Proteaceae. As Australian wildflowers and popular garden plants, they are easily recognised by their characteristic flower spikes and fruiting "cones". They can vary from woody shrubs to trees up to 30 metres tall. They are generally found in a wide variety of landscapes: (occasionally) rainforest, shrubland, and some more arid landscapes, though not in Australia's deserts.