Common name: Western Swamp Oak, Inland Swamp Oak, Swamp Sheoak, Swamp Oak
Casuarina obesa Miq. APNI* 
Description: Dioecious tree 6–15 m high, frequently producing root suckers; ; bark fissured and scaly, grey-brown.
Branchlets drooping in vigorous specimens, spreading in depauperate specimens; articles of nearly same diameter throughout their length when dried, 8–14 mm long, 0.9–1.4 mm diam. often waxy; phyllichnia flat; teeth erect or occasionally slightly spreading, 12–16, 0.3–1.0 mm long. Teeth on young permanent shoots appressed or slightly spreading.
Male spikes 1.2–4 cm long, 7–10 whorls per cm; anther 0.6–1.2 mm long.
Cones ferruginous- to white-pubescent, becoming glabrous, sessile or on peduncle to 10 mm long; cone body 10–20 mm long, 8–10 mm in diameter; bracteole apex broad-acute. Samara 3.5–5.0 mm long.
Distribution and occurrence: Only one known locality in N.S.W., near Euston; reported also from near Moama (not yet confirmed). Also a few localities in NW Victoria and widespread in SW WA (only known as cultivated in SA). Commonly in brackish or saline situations near salt lakes.
NSW subdivisions: SWP, SFWP
Other Australian states: Vic. W.A. ?S.A.
Threatened species: NSW BCA: Endangered
This is the inland/western counterpart of C. glauca, most obviously differing from that species in the erect teeth at the apex of new shoots and in the articles which are less variable in diameter over their length when dried. Possibly hybridises with C. cristata.
Text by K. L. Wilson & L. A. S. Johnson (1990); edited KL Wilson (August 2007, Aug 2012, Feb 2014, March 2018, April 2026).
Taxon concept: Flora of NSW 1 (1990); Wilson and Johnson, Flora of Australia vol. 3 (1989)
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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