About Corymbia citriodora (Hook.) K.D.Hill & L.A.S.Johnson
Corymbia citriodora (Hook.) K.D.Hill & L.A.S.Johnson is a tree that typically reaches a height of 25–40 m (82–131 ft), and may grow as tall as 50 m (160 ft). This species forms a lignotuber, and has smooth, pale bark that is uniform or slightly mottled, ranging in color from white to pink or coppery. The bark is shed in thin flakes. Young plants and coppice regrowth have egg-shaped to lance-shaped leaves that measure 80–210 mm (3.1–8.3 in) long and 32–80 mm (1.3–3.1 in) wide. Adult leaves are the same glossy green shade on both sides, are often lemon-scented when crushed, and are narrow lance-shaped to curved. They are 100–230 mm (3.9–9.1 in) long and 6–28 mm (0.24–1.10 in) wide, tapering to a petiole 10–25 mm (0.4–1.0 in) long. Flower buds grow in leaf axils on a branched peduncle 3–10 mm (0.1–0.4 in) long, with three buds on each branch, each bud attached to a pedicel 1–6 mm (0.04–0.24 in) long. Mature buds are oval to pear-shaped, 6–10 mm (0.24–0.39 in) long and 5–7 mm (0.20–0.28 in) wide, with a rounded, conical or slightly beaked operculum. Flowering occurs in most months, and the flowers are white. The fruit is a woody urn-shaped or barrel-shaped capsule 8–15 mm (0.31–0.59 in) long and 7–12 mm (0.28–0.47 in) wide, with valves enclosed inside the fruit. This species grows in undulating terrain in open forest and woodland, across several disjunct areas in Queensland, extending south as far as Coffs Harbour in New South Wales. In Queensland, it occurs as far north as Lakeland Downs and Cooktown, and as far inland as Hughenden and Chinchilla. An avenue of this species was planted many years ago in Perth's Kings Park, and the species has since spread to become an environmental weed in the Sydney and Blue Mountains region of New South Wales, and in open woodland areas of south-western Western Australia.
