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Grevillea rivularis, commonly known as Carrington Falls grevillea, is a critically endangered species of flowering plant in the family Proteaceae. It is endemic to a restricted distribution within the Carrington Falls area of New South Wales, Australia and grows on moist, sandy soils in riparian environments. It is a dense, spreading shrub with divided leaves with more or less linear, sharply-pointed lobes, and clusters of purplish-cream to mauve-pink flowers that turn pink and darken as they age.
Since it was first described in 1975, Grevillea rivularis has been widely cultivated on the east cost of Australia, from as far north as Rockhampton in Queensland to as far south as Tasmania, as well as abroad in the United States. It has proven hardy in a wide variety of soil types and environmental conditions, from coastal to inland. It can withstand frosts of as low as 10 °C (50 °F) but is unable to withstand extended dry periods. It grows best in acidic to neutral sandy soils that are well-drained but moist in a partly-shaded position. It is used as a hedge or screen plant, where its flowers are attractive to nectivores and its prickly foliage provides refuge and nesting sites for small birds.
Plants are propagated from seed given peeling or scarification treatment, from new growth cuttings or grafted onto the standard Grevillea robusta rootstock, which has proven compatible in the long term. It has also successfully hybridised with G. diesliana in cultivation.
Grevillea rivularis is endemic to the Southern Highlands region in New South Wales, Australia. As the common name would suggest, it is restricted to the Carrington Falls area north of Kangaroo River which encompasses Budderoo National Park. The estimated area of occupancy (AOO) and extent of occurrence (EOO) for this species are less than 4 km2 (1.5 sq mi).
Grevillea acacioides · Grevillea acanthifolia · Grevillea acerata · Grevillea acrobotrya · Grevillea acropogon · Grevillea acuaria · Grevillea adenotricha · Grevillea agrifolia · Grevillea albiflora · Catclaws Grevillea · Grevillea alpivaga · Grevillea althoferorum
Text excerpted from the Wikipedia article Grevillea rivularis by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
