Banksia integrifolia: Australia is the home of banksias. About 71
species are endemic and one species is found in New Guinea. The majority of
banksias come from Western Australia, one from the Northern territory and about
a dozen species call the east coast home. Banksia
integrifolia is a common species along the east coast and ranges and usually
develops into a tall shrub or small tree. In some sheltered areas the plants
will reach a height of 25 metres (75 feet). There is also a ground covering
form, which grows on exposed coastal headlands. The stiff leathery leaves are
dark green on the upper surface and the lower surface has a silvery appearance.
The flower heads are composed of hundreds of individual flowers that are pale
yellow and rich in nectar. Flowering takes place in autumn and winter. Each
flower head may reach a length of 15 centimetres (6 inches). The flowers are
followed by woody cone that contain many follicles (dry fruits). The follicles
contain a woody divider, one infertile seed and one winged fertile seed. Most
banksias have persistent follicles, which only open when the plant is damaged by
fire. Banksia integrifolia follicles open at maturity. Seedlings are
common around mature plants. Three sub-species are recognised. The species
propagates readily from seeds.
Plants