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Casuarina glauca
Also called Brazilian Oak, Swamp Sheoak, Grey Bull Oak, Grey She Oak, Longleaf Casuarina, Longleaf Ironwood, Marsh She Oak
Gray sheoak (Casuarina glauca) is a fast-growing evergreen tree native to eastern Australia, usually 8 to 20 m tall, that suckers from its roots. It thrives in moist or waterlogged soils and is best grown in full sun with plenty of space.
Casuarina glauca, commonly known as swamp oak, is a species of flowering plant that is endemic to eastern Australia. It is also known as swamp buloke, swamp she-oak, marsh sheoak or grey she-oak, and is called guman by the Gadigal people in the Dharug language. It is a dioecious tree that often forms root suckers and has fissured and scaly bark, spreading or drooping branchlets, the leaves reduced to scales in whorls of 12 to 20, the fruit 9–18 mm (0.35–0.71 in) long containing winged seeds (samaras) 3.5–5.0 mm (0.14–0.20 in) long.
Casuarina glauca has been planted widely as a street tree in Canberra. It was introduced to Haiti to stabilise the soil and to be used as timber for poles, and to Florida where it was planted as an ornamental plant and windbreak.
The bark has been used to plant orchids on.
Swamp she-oak is found along Australia's east coast from Yeppoon in central Queensland to Bermagui in southern New South Wales. Some stands within the Royal Botanic Gardens in Sydney predate European settlement. Populations along the New South Wales coastline are at risk due to clearing of habitat for development. It has become highly invasive in Florida.
Text excerpted from the Wikipedia article Casuarina glauca by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
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.
