Yilgarn dryandra

Priority Four — Rare Taxa (DEC)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Banksia
Subgenus: Banksia subg. Banksia
Series: Banksia ser. Dryandra
Species:
B. arborea
Binomial name
Banksia arborea
Synonyms[1]

Dryandra arborea C.A.Gardner

Banksia arborea, commonly known as Yilgarn dryandra,[2] is a species of tree that is endemic to Western Australia. It has serrated, sharply pointed leaves, and yellow flowers and is found inland north of Southern Cross.

Description

Banksia arborea is a tree that typically grows to a height of 6 m (20 ft) and has a thick trunk. Its leaves are elliptical to lance-shaped, 30–60 mm (1.2–2.4 in) long, 14–22 mm (0.55–0.87 in) wide and serrated with up to six sharply pointed triangular teeth on each side. The flower spikes are borne on the ends of branches and are composed of between 110 and 180 individual flowers. The perianth is 20–28 mm (0.79–1.10 in) long and yellow with shaggy hairs. Flowering mainly occurs between March and May, or in September or October and the fruit is an egg-shaped follicle 8–15 mm (0.31–0.59 in) long that opens when mature.[2][3]

Taxonomy and naming

Yilgarn dryandra was first formally described in 1964 by Charles Gardner who gave it the name Dryandra arborea in the Journal of the Royal Society of Western Australia from specimens he collected on hills near Koolyanobbing.[4][5] In 2007, Austin Mast and Kevin Thiele changed the name to Banksia arborea.[6] The specific epithet (arborea) is a Latin word meaning "tree-like".[7]

Distribution and habitat

Banksia arborea grows between ironstone rocks in open shrubland on hills north of Southern Cross.[2][5]

Conservation status

This banksia is classified as "Priority Four" by the Government of Western Australia Department of Parks and Wildlife,[2] meaning that is rare or near threatened.[8]

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.[9]

References

  1. 1 2 "Banksia arborea". Australian Plant Census. Retrieved 23 March 2020.
  2. 1 2 3 4 "Banksia arborea". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. ↑ George, Alex S. (1999). Flora of Australia (PDF). Vol. 17B. Canberra: Australian Biological Resources Study, Canberra. pp. 269–270. Retrieved 24 March 2020.
  4. ↑ "Dryandra arborea". APNI. Retrieved 24 March 2020.
  5. 1 2 Gardner, Charles Austin (1964). "Contributiones Florae Australiae Occidentalis, XIII". Journal of the Royal Society of South Australia. 47 (2): 59. Retrieved 24 March 2020.
  6. ↑ "Banksia arborea". APNI. Retrieved 24 March 2020.
  7. ↑ Francis Aubie Sharr (2019). Western Australian Plant Names and their Meanings. Kardinya, Western Australia: Four Gables Press. p. 136. ISBN 9780958034180.
  8. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 24 March 2020.
  9. ↑ Fitzpatrick, Matthew C.; Gove, Aaron D.; Sanders, Nathan J.; Dunn, Robert R. (2008). "Climate change, plant migration, and range collapse in a global biodiversity hotspot: the Banksia (Proteaceae) of Western Australia". Global Change Biology. 14 (6): 1–16. doi:10.1111/j.1365-2486.2008.01559.x.
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