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Grevillea exul, also known as common toothbrush, is a species of flowering plant in the family Proteaceae, endemic to New Caledonia. It is a shrub or tree with white flowers which grows up to 4–10 metres (13–33 ft) tall. Like all other grevillea species of New Caledonia, it is a manganese accumulator.
Grevillea exul was cultivated at the Royal Botanic Gardens in Sydney from 1850 until at least 1903, where it fell out of cultivation early in the 20th century. In 1988, gardens staff recollected the species, re-establishing it in cultivation and sharing material with the Grevillea Study Group of the Australian Native Plants Society. Today, it is now grown at a variety of botanical gardens across Australia, including the Brisbane Botanic Gardens and the Royal Botanic Gardens Victoria's Southwest Pacific Island collection.
It is a hardy and adaptable species, able to grow in a wide variety of climatic conditions from tropical climates to cold, wet winters. It can withstand frost of 2 °C (36 °F) and can withstand dry periods with little adverse effects. Plants which are grown on their own roots appear to grow as well as those grafted onto a rootstock, usually from Grevillea robusta. It is a long-lived plant that flowers vigorously in season and may be used as an ornamental shrub.
Grevillea exul is widely distributed across New Caledonia, occurring in valleys, ridges and slopes 6–1,250 metres (20–4,101 ft) above sea level. It grows in a variety of soils from serpentine schist and skeletal soil to alluvial sand in open forest or scrub.
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 exul 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.
