Banksia densa
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Banksia densa is a species of column-like shrub that is endemic to Western Australia. It has deeply serrated to pinnatifid leaves, creamy yellow flowers in heads of up to seventy-five, and hairy follicles.
Description
Banksia densa is a shrub, usually with a column-like form that typically grows to a height of Template:Cvt but does not form a lignotuber. It has linear, pinnatifid leaves that are Template:Cvt long and Template:Cvt wide on a petiole up to Template:Cvt long. There are between eight and thirteen sharply pointed linear to triangular lobes up to Template:Cvt long on each side of the leaves and the lower surface is covered with woolly white hairs. The flowers are arranged in heads of between forty and seventy-five with rusty-hairy or velvety, linear involucral bracts up to Template:Cvt long at the base of the head. The flowers have a creamy yellow, hairy perianth Template:Cvt or Template:Cvt long, depending on subspecies, and a mostly glabrous pistil Template:Cvt long or Template:Cvt long. Flowering occurs from May to October and the fruit is a hairy, egg-shaped to elliptical follicle Template:Cvt long.[1][2][3]
Taxonomy and naming
This species was first formally described in 1870 by George Bentham who gave it the name Dryandra conferta and published the description in Flora Australiensis.[4][5] The specific epithet (conferta) is from a Latin word meaning "crowded".[6]
In 1996, Alex George described two varieties:[3]
- Dryandra conferta var. conferta with a perianth Template:Cvt long and a pistil Template:Cvt long and flowers with a mouse-like or honey-like scent;
- Dryandra conferta var. parva with a perianth Template:Cvt long and a pistil Template:Cvt long.
In 2007, Austin Mast and Kevin Thiele transferred all Dryandra species to Banksia. As there was already a species named Banksia conferta, Mast and Thiele changed the specific epithet to "densa".[7][8]
The changed names of the varieties are as follows and are accepted at the Australian Plant Census:
Distribution and habitat
Banksia densa is widespread in inland parts of the south-west of Western Australia, growing in kwongan, woodland and shrubland between Miling, Cadoux the Porongorups, Bodallin and Mount Holland. Variety parva has a more southerly distribution than var. densa.[3][2]
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.[11]
Conservation status
This banksia is classified as "Priority Two" by the Western Australian Government Department of Parks and Wildlife[1] meaning that it is poorly known and from only one or a few locations.[12]
References
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