Casuarina obesa, Swamp Sheoak

Plant Group: Australian Native

Genus:  Casuarina

Species Var: obesa

Common Name: Swamp Sheoak

Height: 3–15 metres

Width: 3–6 metres

Rate of growth: Moderate to fast

Foliage: Fine, drooping thin green branchlets (articles) with tiny scale-like teeth arranged in whorls; creates a feathery, sheoak, like appearance.

Flowers: Separate male and female plants; male catkins (spikes) 15–60 mm long; female plants produce small clusters of woody cone-like fruit.

Fruit: Cylindrical cones (10–20 mm long) containing winged seeds (samaras) 3–5 mm long.

Quick Facts:

Habitat & Tolerance: Thrives in moist, often saline or brackish sites—swamps, creek banks, salt lake edges; highly tolerant of waterlogging and salinity.

Distribution: Native to southern mainland Australia—common in southwest Western Australia; less common and more threatened in NSW and Victoria.

Ecological Value: Excellent for land rehabilitation, erosion control, salt-affected soil stabilization, and urban plantings (salt-tolerant).

Propagation & Regeneration: Propagates from seed or via root suckering; resilient and regenerates readily after disturbance.

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