Common name: River Oak, River Sheoak
Casuarina cunninghamiana Miq. APNI* Description: Dioecious tree 15–35(–50) m high with branchlets drooping in vigorous specimens, erect in depauperate specimens; bark finely fissured and scaly, grey-brown.
Branchlets drooping in vigorous specimens, erect in depauperate specimens; articles mostly glabrous, srticles 6–9 mm long, 0.4–0.6 mm diam.; edges of furrows often marked (in dried specimens) by a slight ridge; edges of furrows often marked (when dry) by a slight ridge; phyllichnia angular to flat with a median rib; teeth 6–10, erect, withering, 0.3–0.5 mm long. Teeth on new shoots erect.
Male spikes 0.4–4 cm long, 11–13 whorls per cm; anther 0.4–0.7 mm long.
Cones sparsely pubescent, on peduncle 2–9 mm long; cone body 7–14 mm long, 4–6 mm diameter; bracteole apex broad-acute to acute. Samara 3–4 mm long.
Distribution and occurrence: Typical subspecies in Eastern NSW and eastern Queensland, from Laura south to Bega; other subspecies in the Top End of the NT and the base of the Gulf of Carpentaria in Qld. along permanent freshwater streams.
NSW subdivisions: NC, CC, SC, NT, CT, ST, NWS, CWS, SWS, NWP, SWP
Other Australian states: Qld N.T.
Text by K. L. Wilson & L. A. S. Johnson (1990); edited KL Wilson (Feb 2014; Dec 2016; April 2026)
Taxon concept: Flora of NSW 1; Wilson and Johnson, Flora of Australia vol. 3 (1989)
| N.S.W. occurrences are: subsp. cunninghamiana |
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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