Grevillea diffusa

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Grevillea diffusa
Grevillea diffusa flowers (8708295479).jpg
In Heathcote National Park
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Grevillea
Species:
G. diffusa
Binomial name
Grevillea diffusa
Synonyms [1]

Grevillea diffusa is a species of flowering plant in the family Proteaceae and is endemic to the Sydney region of New South Wales. It is a low, compact shrub with elliptic to linear leaves, and dark red, or dark crimson to scarlet and burgundy-coloured flowers.

Contents

Description

Grevillea diffusa is compact shrub that typically grows to a height of up to 50 cm (20 in) but sometimes an erect shrub to 2 m (6 ft 7 in). The leaves are elliptic to lance-shaped with the narrower end towards the base, or linear, 20–130 mm (0.79–5.12 in) long and 1–10 mm (0.039–0.394 in) wide, the lower surface silky-hairy and the edges curved down or rolled under. The flowers are arranged in dome-shaped to more or less spherical groups and are dark red, dark crimson to burgundy-coloured or scarlet, depending on subspecies. The pistil is usually 6–11 mm (0.24–0.43 in) long and the style strongly curved and more or less glabrous. Flowering occurs from July to November and the fruit is a glabrous follicle. [2] [3] [4] [5]

Taxonomy

Grevillea diffusa was first formally described in 1827 by Kurt Polycarp Joachim Sprengel in Systema Vegetabilium from an unpublished description by Sieber. [6] [7] The specific epithet (diffusa) means "spread out". [8]

In 1986, Donald McGillivray described subspecies of G. diffusa in his book New Names in Grevillea (Proteaceae), and in 2000 Robert Owen Makinson described subspecies in Flora of Australia , and the following three names are accepted by the Australian Plant Census:

Distribution and habitat

This grevillea grows in forest or woodland, occasionally in swampy heath and is restricted to Hawkesbury sandstone in the Sydney basin. Subspecies constablei is found south of Sydney from Waterfall to Helensburgh and near the Georges River, subspecies diffusa from the lower Georges River to the Illawarra region and subspecies filipendula between Calga and Mount White, north of Sydney. [10] [11] [13] [14] [16] [17]

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References

  1. 1 2 "Grevillea diffusa". Australian Plant Census. Retrieved 25 March 2022.
  2. Makinson, Robert O. "Grevillea diffusa". Australian Biological Resources Study, Department of Agriculture, Water and the Environment. Retrieved 25 March 2022.
  3. Makinson, Robert O. "Grevillea diffusa". Royal Botanic Garden Sydney. Retrieved 25 March 2022.
  4. Wood, Betty. "Grevillea diffusa". Lucid Keys. Retrieved 25 March 2022.
  5. Fairley, Alan; Moore, Philip (1989). Native plants of the Sydney district : an identification guide. Kenthurst: Kangaroo Press in association with the Society for Growing Australian Plants-NSW. p. 170. ISBN   0864172613.
  6. "Grevillea diffusa". APNI. Retrieved 25 March 2022.
  7. Sprengel, Kurt P.J. (1827). "Curae Posteriores". Systema Vegetabilium (17 ed.). 4 (2): 46. Retrieved 25 March 2022.
  8. Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 183. ISBN   9780958034180.
  9. "Grevillea diffusa subsp. constablei". Australian Plant Census. Retrieved 25 March 2022.
  10. 1 2 Makinson, Robert O. "Grevillea diffusa subsp. constablei". Australian Biological Resources Study, Department of Agriculture, Water and the Environment. Retrieved 25 March 2022.
  11. 1 2 Makinson, Robert O. "Grevillea diffusa subsp. constablei". Royal Botanic Garden Sydney. Retrieved 25 March 2022.
  12. "Grevillea diffusa subsp. diffusa". Australian Plant Census. Retrieved 25 March 2022.
  13. 1 2 Makinson, Robert O. "Grevillea diffusa subsp. diffusa". Australian Biological Resources Study, Department of Agriculture, Water and the Environment. Retrieved 25 March 2022.
  14. 1 2 Makinson, Robert O. "Grevillea diffusa subsp. diffusa". Royal Botanic Garden Sydney. Retrieved 25 March 2022.
  15. "Grevillea diffusa subsp. filipendula". Australian Plant Census. Retrieved 25 March 2022.
  16. 1 2 Makinson, Robert O. "Grevillea diffusa subsp. filipendula". Australian Biological Resources Study, Department of Agriculture, Water and the Environment. Retrieved 25 March 2022.
  17. 1 2 Makinson, Robert O. "Grevillea diffusa subsp. filipendula". Royal Botanic Garden Sydney. Retrieved 25 March 2022.