Description: Shrubs or small trees, glabrous; stems ± square with 4 prominent ribs.
Leaves opposite with toothed margins, juveniles pinnatisect or pinnatifid, midrib prominent; petiolate or sessile.
Inflorescences simple or compound dichasia in an elongated spike, terminal and lateral. Flowers cream, rarely red, 4-merous, ± sessile or pedicellate; sepals 4, triangular, smooth; petals 4, boat-shaped to flat. Stamens 8; anthers shortly apiculate. Ovary 4-locular, glabrous; styles 4.
Fruit variable in shape, obovoid to obpyramidal, 4 ribbed and winged, pericarp ± spongy.
Distribution and occurrence: World: 6 species, endemic Australia. N.S.W., Vic., W.A.
Text by Peter G. Wilson
Taxon concept:
| | Key to the species | |
| 1 | Fruits ovoid, obtusely angled when dry, never strongly ribbed | Haloragodendron gibsonii |
| Fruits obovoid to obpyramidal, strongly angled and ribbed, or winged | 2 |
| 2 | Leaves usually 1–1.5 cm long; fruit angled and ribbed | Haloragodendron monospermum |
| Leaves at least 2.5 cm long; hypanthium and fruit distinctly winged
Back to 1 | 3 |
| 3 | Wings conspicuously veined; anthers 2–4 mm long | Haloragodendron baeuerlenii |
| Wings not conspicuously veined; anthers mostly 4–6 mm long
Back to 2 | Haloragodendron lucasii |
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