Grevillea commutata
Near Kalbarri
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Grevillea
Species:
G. commutata
Binomial name
Grevillea commutata
Subspecies
  • Grevillea commutata subsp. commutata F.Muell.
  • Grevillea commutata subsp. pinnatisecta Makinson

Grevillea commutata is a species of flowering plant in the family Proteaceae and is endemic to the west of Western Australia. It is a spreading, open to dense shrub with egg-shaped leaves with the narrower end towards the base, and white, cream-coloured, and pinkish-green flowers.

Description

Grevillea commutata is a spreading, open to dense, multi-stemmed shrub that typically grows to a height of 1–3 m (3 ft 3 in – 9 ft 10 in) and has silky to woolly hairs on the branchlets. Its leaves are usually narrowly to broadly egg-shaped leaves with the narrower end towards the base, 30–120 mm (1.2–4.7 in) long and 2–10 mm (0.079–0.394 in) wide. The leaves are sometimes divided with two to seven linear to narrow egg-shaped lobes 30–60 mm (1.2–2.4 in) long and 1–6 mm (0.039–0.236 in) long. The flowers are arranged in groups on a rachis 8–20 mm (0.31–0.79 in) long, the pistil 10–15 mm (0.39–0.59 in) long and silky-hairy, the style with a green to cream-coloured tip. The fruit is a glabrous follicle 10–14 mm (0.39–0.55 in) long.[3][4]

Taxonomy

Grevillea commutata was first formally described in 1868 by Ferdinand von Mueller in Fragmenta Phytographiae Australiae from specimens collected by Augustus Oldfield near Gregory.[5][6] The specific epithet (commutata) means "changed" or "altered", referring to the variable leaf forms.[7]

In 2000, Robert Owen Makinson described two subspecies in the Flora of Australia, and the names are accepted by the Australian Plant Census:

  • Grevillea commutata F.Muell. subsp. commutata[8] has mostly narrowly egg-shaped leaves with the narrower end towards the base, and flowers from October to February;[9][10]
  • Grevillea commutata subsp. pinnatisecta Makinson[11] has mostly divided leaves and flowers from June to December.[12][13]

Distribution and habitat

Grevillea commutata grows in heath or shrubland on sandplains, dunes and coastal breakaways from north of the Murchison River to the Greenough River and inland to Yuna in the Coolgardie, Geraldton Sandplains and Yalgoo biogeographic regions of western Western Australia.[3][4][9][10][12][13]

Conservation status

This grevillea and both its subspecies are listed as "not threatened" by the Department of Biodiversity, Conservation and Attractions.[4][10][13] However, on the more recent IUCN Red List assessment, it has been listed as Vulnerable. It has an extent of occurence of less than 20,000km² and a severely fragmented population. It is threatened by land clearing and habitat destruction for agriculture and urban development in the city of Geraldton.[1]

See also

References

  1. 1 2 Keighery, G.; Makinson, R.; Monks, L. (2020). "Grevillea commutata". IUCN Red List of Threatened Species. 2020: e.T112650607A113307811. doi:10.2305/IUCN.UK.2020-3.RLTS.T112650607A113307811.en. Retrieved 27 December 2023.
  2. ↑ "Grevillea commutata". Australian Plant Census. Retrieved 3 March 2022.
  3. 1 2 "Grevillea commutata". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 3 March 2022.
  4. 1 2 3 "Grevillea commutata". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  5. ↑ "Grevillea commutata". APNI. Retrieved 3 March 2022.
  6. ↑ von Mueller, Ferdinand (1868). Fragmenta Phytographiae Australiae. Vol. 6. Melbourne: Victorian Government Printer. pp. 207–208. Retrieved 3 March 2022.
  7. ↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 167. ISBN 9780958034180.
  8. ↑ "Grevillea commutata subsp. commutata". Australian Plant Census. Retrieved 3 March 2022.
  9. 1 2 "Grevillea commutata subsp. commutata". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 3 March 2022.
  10. 1 2 3 "Grevillea commutata subsp. commutata". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  11. ↑ "Grevillea commutata subsp. pinnatisecta". Australian Plant Census. Retrieved 3 March 2022.
  12. 1 2 "Grevillea commutata subsp. pinnatisecta". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 3 March 2022.
  13. 1 2 3 "Grevillea commutata subsp. pinnatisecta". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
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