Grevillea sericea var. diffusa(Sieber ex Spreng.) Benth.
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.
Grevillea diffusa is compact shrub that typically grows to a height of up to 50cm (20in) but sometimes an erect shrub to 2m (6ft 7in). The leaves are elliptic to lance-shaped with the narrower end towards the base, or linear, 20–130mm (0.79–5.12in) long and 1–10mm (0.039–0.394in) 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 6–11mm (0.24–0.43in) long and the style strongly curved and more or less glabrous. Flowering occurs from July to November and the fruit is a glabrous follicle.[3][4][5][6]
Grevillea diffusa subsp. constableiMakinson[10] has narrowly elliptic to more or less linear leaves mostly 60–70mm (2.4–2.8in) long and 2–4mm (0.079–0.157in) wide, peduncles less than 15mm (0.59in) long and dark crimson to dark burgundy-coloured flowers;[11][12]
Grevillea diffusaSieber ex Spreng. subsp. diffusa[13] has elliptic leaves 15–55mm (0.59–2.17in) long and 2–4mm (0.079–0.157in) wide, peduncles up to 10mm (0.39in) long and dark red flowers;[14][15]
Grevillea diffusa subsp. filipendulaMcGill.[16] has narrowly elliptic to more or less linear leaves mostly 60–70mm (2.4–2.8in) long and 2–4mm (0.079–0.157in) wide, peduncles 15–40mm (0.59–1.57in) long and scarlet to light burgundy-coloured flowers.[17][18]
Grevillea diffusa has been listed as Least Concern on the IUCN Red List of Threatened Species. Although its distribution is restricted, the population of this species is presumed to be stable and there are currently no major threats impacting it. Increased fire regimes may pose a minor threat in some areas of its distribution.[1]
↑ Makinson, Robert O. "Grevillea diffusa". Australian Biological Resources Study, Department of Agriculture, Water and the Environment. Retrieved 25 March 2022.
↑ Makinson, Robert O. "Grevillea diffusa". Royal Botanic Garden Sydney. Retrieved 25 March 2022.
↑ 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. ISBN0-86417-261-3.
↑ Sprengel, Kurt P.J. (1827). "Curae Posteriores". Systema Vegetabilium. 4 (2) (17ed.): 46. Retrieved 25 March 2022.
↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rded.). Kardinya, WA: Four Gables Press. p.183. ISBN978-0-9580341-8-0.
1 2 Makinson, Robert O. "Grevillea diffusa subsp. constablei". Australian Biological Resources Study, Department of Agriculture, Water and the Environment. Retrieved 25 March 2022.
1 2 Makinson, Robert O. "Grevillea diffusa subsp. diffusa". Australian Biological Resources Study, Department of Agriculture, Water and the Environment. Retrieved 25 March 2022.
1 2 Makinson, Robert O. "Grevillea diffusa subsp. filipendula". Australian Biological Resources Study, Department of Agriculture, Water and the Environment. Retrieved 25 March 2022.
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