Banksia integrifolia ssp compar       18012

It is a medium spreading tree. The bark is rough, light grey, fissured.

The leaves are 5-15cm x 2-7cm, broad and obovate, shiny green above, silvery beneath. It has entire or shortly toothed margins.

The flower-heads are 5-15cm long, pale yellow, borne at the ends of short branchlets.

The cones are silvery grey, free of styles. The seeds are not retained after maturity.

Member of
The Genus: Banksia Subgenus: Banksia Section: Banksia Serie: Salicinae having the following characters: Stems sympodial or monopodial then lateral buds under the inflorescence removed. Inflorescence cylindrical, ovoid or appearing spherical; axis cylindrical, rarely ovoid, 2–30cm long, rarely shorter; flowers c. 200 to c. 5000 per inflorescence. The tepals usually all separate into a basal tube. Semi-elliptical, semi-circular or oblong follicular valves, rarely (Banksia elegans) obliquely ovoid.

Leaves flat, rarely channeled below; curved or flat margins. Development of the generally acropetal inflorescence. Pistil straight or recurved, or in some taxa folded or S-shaped below the apex, never hooked; trained pollen presenter; pollen ovoid, crescent-shaped or cylindrical. Follicles with or without stylar point split. Cotyledons usually broadly obovate or wedge-shaped, sometimes notched or crenate.

Shrubs or trees, erect or spreading. Leaves alternate or whorled, entire, dentate or serrated; flat or curved margins. Inflorescence erect, cylindrical; buds usually lose their regular shape well before anthesis. Thin involucral bracts, tomentose or villous, usually falling before anthesis. Perianth narrowly pubescent or shaggy; tepals not awned. Pistil straight or very slightly curved; barely thickened pollen presenter; ovoid pollen. The follicles do not separate from the stylar point. Seed wing not notched.

A series of 11 species from eastern and northern Australia, with one species extending to New Guinea and the Aru Islands.

It is a very useful species for planting in coastal areas and is widely used for beach reclamation work and erosion control. Responds to water during dry periods. Has been used as a rootstock for difficult to grow western Banksias.

References
- Encyclopedia of Australian Plants, Elliot W. Rodger & Jones David L. 2012 Vol. 2 pag. 294. ISBN
- Flora of Australia. profiles.ala.org.au/opus/foa/profile Vol. 17B pag. 186-189. Banksia integrifolia ssp compar
- The Banksia Book, Alex S. George. 1987 pag. 50-51. ISBN
- The genus Banksia L.f. (Proteaceae), George, Alexander S. Nuytsia 1981 Vol. 3 pag. 239-473. Address

- Encyclopedia of Australian Plants, Elliot W. Rodger & Jones David L. 2012 pag. 286. ISBN
- Further new taxa in Banksia (Proteaceae: Grevilleoideae), George, Alexander S. Nuytsia 2008 Vol. 18 pag. 53-59. Address
- Further new taxa in Dryandra R.Br. (Proteaceae : Grevilleoideae), George, Alexander S. Nuytsia 2005 Vol. 15 pag. 337-346. Address
- New subspecies of Banksia seminuda and B. occidentalis (Protaceae) from the south coast of Western Australia, Hopper, SD. Nuytsia 1989 Vol. 7(1) pag. 15-24. Address
- New taxa and a new infrageneric classification in Dryandra R.Br. (Proteaceae : Grevilleoideae), George, Alexander S. Nuytsia 1996 Vol. 10 pag. 313-408. Address
- The Banksia Book, Alex S. George. 1987. ISBN
- The Dryandras, Tony Cavanagh and Margaret Pieroni. 2006. ISBN
- Two new Western Australian species segregated from Banksia densa (Proteaceae), Thiele, Kevin,. Nuytsia 2019 Vol. 30 pag. 203-214. Address

Biological type: tree
Frost resistance: 19ºF
Leaf color: green gray
Flower color: yellow
No transplantation: Yes

Specifications for the Mediterranean basin
Adult size (h x w): 32,8ft x 32,8ft
Sun exposure: full sun (Sun hours: >6h
Foliage: evergreen
Growth: fast
Flowering time from July until December

Specific information for our garden
Planting substrate: 30%Compost+30%Coco+40%Sand
Plant watering: 3x a week pH 6.5
Logical sequence of containers for: Heathers; forestry plate, forestry pot 3L, Airpot 12L, Airpot 50L
Propagation is done by cuttings

Ecology in its country of origin
Rainfall: 800-1200mm
Sandy soil: much
Coastal soil: a little

SPRING Heat up the capsules in a oven at 572°F for 2 minutes and get the seeds out. Sow the seeds at 2mm depth in the Well Drained Seed Sowing Mix and pouwder with 2mm Smoked Vermiculite (0,012g/cm²) between 68-77°F. During germination keep the substrate moist and in daylight. The seeds germinate in 3-6 weeks.
The average seed weight is 73,2 per gram (0,01366g).

Germination references
- Australian Rainforest Seeds: A Guide to Collecting, Processing and Propagation, Mark Dunphy, Steve McAlpin, Paul Nelson, Michelle Chapman, Hugh Nicholson. 2020. ISBN
- Fire intensity, serotiny and seed release in 19 woody species: evidence for risk spreading among wind-dispersed and resprouting syndromes, Peter J. Clarke, Kirsten J. E. Knox and Damian Butler. Australian Journal of Botany 2010 Vol. 58 pag. 629-636. DOI

Germination references for the genus
- Seed biology and seed bank dynamics of Western Australian native plants. 2020. Address

Cuttings instructions
Take the cuttings in early fall. Soak them in a hormonal preparation for cuttings before planting them in a substrate composed of 50% perlite and 50% heather earth. Keep them sufficiently moist at a temperature of 20°C in sealed freezer bags. Keep the light on for 16 hours a day.