Banksia integrifolia

Banksia integrifolia Coast (Coastal) Banksia

Banksia integrifolia Coast (Coastal) Banksia

Banksia integrifolia Coast (Coastal) Banksia

Genus: Banksia. 

species: integrifolia.

Family: PROTEACEAE

Common Name: Coast (Coastal) Banksia.

Etymology:  Banksia: After Sir Joseph Banks (1743–1820) patron of natural sciences who also sailed around the world with Captain Cook 1768-71.  integrifolia: entire, undivided (leaves).

Origin: Coastal Victoria to central Queensland Australia.

Description:  Medium sized tree up to 25 metres in height, but in sheltered locations it can reach 35 metres. In more exposed areas it may grow as a small, gnarled  and twisted tree, reaching no more than about 5 metres, and in highly exposed coastal headlands, it may even be reduced to a small shrub.

Foliage: Dark green above & silvery-white hairs below with prominent midrib. Leaves are 4-20 cm long & 6-35 mm wide, oblong to narrow lanceolate or wedge shaped with a short stalk. 

Bark: Hard, rough, light grey, sometimes fissured with granular appearance.      

Flowers: Pale-yellow, tubular, 22-25 mm long with wiry, straight, protruding styles, grouped in cylindrical terminal upright spikes, 5-15 cm long & 5- 8 cm diameter. Flowers mainly in Summer, Autumn & early winter.   

Fruit: Grey oblong to cylindrical cones, 7-15 cm long & 7-8 cm diameter with numerous brown protruding follicles, 8-17 mm long, usually containing 2 black winged ovate seeds, released at maturity.

Growth Requirements: Well drained sandy-sandy loam soil in sunny to part-shade position. Plant will not tolerate waterlogged soil.

Uses: Coastal, poor & sandy soils, Australian native gardens, bird attracting.

Maintenance: Little maintenance is required as plant is quite hardy. Regular deep watering will help establish plant in the first 12 months and a low phosphorus fertilizer (use Australian Native) can be used very sparingly.

Propagation: Is easy from seed. A common way to release seed is to place the ‘cone’ in an oven at 120°­140° C for about an hour. The follicles then open and the seeds can be removed with tweezers. Seeds should be sown in a very freely draining seed-raising mix which should not be allowed to dry out. As Banksia seedlings are prone to fungal attack, it is better to sterilise the seed-raising mix before planting. If this is not practical, very clean ingredients should be used. Propagation from cutting is the only reliable way to maintain a selected form, but success can often be difficult.

Banksia integrifolia Coast (Coastal) Banksia trunk
Banksia integrifolia Coast (Coastal) Banksia seedpod

References:

  • Leonard Cronin Key Guide.
  • Wikipedia.
  • florabase.dpaw.wa.gov.au.
  • theseedsite.co.uk.
  • www.abc.net.au/gardening.
  • www.anbg.gov.au/banksia.

 

About Simon 93 Articles

Simon Schubert is a qualified Horticulturist who enjoys gardening and bush-walking. He has a keen interest in science, the natural world and particularly our environment. He would like to share his experiences and knowledge while learning better practices that will hopefully benefit the future for us all. Please join him on some fun adventures while learning about the life of plants and other interesting facts about our world.

Be the first to comment

Leave a Reply