Banksia formosa

Description

Banksia formosa is an erect shrub that typically grows to a height of 1-3 m but does not form a lignotuber. It has hairy branchlets and leaves that are broadly linear in outline, pinnatipartite, 70-160 mm long and 6-11 mm wide on a petiole 2-3 mm long. There are between thirty and forty-five more or less triangular lobes on each side of the leaves. The flowers are borne on a head containing between 100 and 220 flowers in each head. There are oblong to egg-shaped involucral bracts 16-20 mm long at the base of the head. The flowers have a golden orange perianth 25-39 mm long and a yellow pistil 29-55 mm long. Flowering occurs in May or from September to December and the fruit is a glabrous follicle 11-13 mm long. Each head may have up to thirteen follicles.

Taxonomy and naming

This species was first formally described in 1810 by Robert Brown who gave it the name Dryandra formosa and published the description in the Transactions of the Linnean Society of London.

In 2007, Austin Mast and Kevin Thiele transferred all the dryandras to the genus Banksia and this species became Banksia formosa. The specific epithet (formosa) is a Latin word meaning "beautiful on account of form".

Distribution and habitat

Banksia formosa grows in kwongan and open forest between Busselton and Two Peoples Bay Nature Reserve and is common near Albany and in the Stirling Range.

Ecology

An assessment of the potential impact of climate change on this species found that its range is likely to contract by between 50% and 80% by 2080, depending on the severity of the change.

References

Image:Botanical Magazine 4102 Dryandra formosa(pl).jpeg|Botanical illustration from Curtis's Botanical Magazine

References

1. "''Banksia formosa''".
2. {{FloraBase
3. (1999). "Flora of Australia". Australian Biological Resources Study, Canberra.
4. "''Dryandra formosa''". APNI.
5. (1810). "On the Proteaceae of Jussieu". Transactions of the Linnean Society of London.
6. "''Banksia formosa''". APNI.
7. (2013). "The transfer of Dryandra R.Br. to Banksia L.f. (Proteaceae)". Australian Systematic Botany.
8. Francis Aubie Sharr. (2019). "Western Australian Plant Names and their Meanings". Four Gables Press.
9. (2008). "Climate change, plant migration, and range collapse in a global biodiversity hotspot: the ''Banksia'' (Proteaceae) of Western Australia". Global Change Biology.