Eucalyptus tetrapleura L.A.S.Johnson APNI* 
Description: Tree to 30 m high; bark persistent throughout, grey-black to grey-brown, 'ironbark'.
Juvenile leaves disjunct, broad-lanceolate to ovate, dull green. Adult leaves disjunct, lanceolate to broad-lanceolate, 12–20 cm long, 1.5–3 cm wide, green, dull, concolorous.
Conflorescence compound; umbellasters 7-flowered; peduncle narrowly flattened or angular, 15–30 mm long; pedicels 4-angled, 8–12 mm long. Buds fusiform, 10–13 mm long, 4–5 mm diam., scar present; calyptra conical, shorter and narrower than the 4-angled hypanthium. Outer stamens infertile; anthers cuboid.
Fruit conical or pyriform, 4–5-locular, 4-angled, 8–10 mm long, 6–8 mm diam.; disc depressed; valves enclosed.
Distribution and occurrence: Restricted and local; south of Grafton only. E. tetrapleura is also known to intergrade with other local ironbarks E. siderophloia and E. fibrosa. For example, plants from north of the Clarence River that have features resembling this species are all of hybrid origin. Open forest or woodland, on moderately fertile soil, often in lower areas.
NSW subdivisions: NC
Threatened species: NSW BCA: Vulnerable; Commonwealth EPBC: Vulnerable
Text by K. Hill
Taxon concept: Flora of NSW 2 (1991)
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