Eucalyptus ovata, commonly known as swamp gum or black gum,[2] is a species of small to medium-sized tree that is endemic to south-eastern Australia. It has mostly smooth bark, glossy green, lance-shaped to egg-shaped adult leaves, green flower buds in groups of seven, white flowers and conical to bell-shaped fruit.
Eucalyptus ovata is a tree that typically grows to a height of 17–30 m (56–98 ft) and forms a lignotuber, but with a variable habit, from a straggly sapling in east Gippsland to stout-boled elsewhere. It has smooth, grey, whitish or pinkish-grey new bark, sometimes with loose rough bark near the base of larger trees. Young plants and coppice regrowth have elliptical to egg-shaped leaves that are 30–85 mm (1.2–3.3 in) long and 25–60 mm (0.98–2.36 in) wide. Adult leaves are the same shade of glossy green on both sides, lance-shaped to egg-shaped, 80–180 mm (3.1–7.1 in) long and 16–50 mm (0.63–1.97 in) wide, tapering to a petiole 15–33 mm (0.59–1.30 in) long. The flower buds are arranged in leaf axils on an unbranched peduncle, 3–14 mm (0.12–0.55 in) long, the individual buds on pedicels 2–4 mm (0.079–0.157 in) long. Mature buds are diamond-shaped, 5–9 mm (0.20–0.35 in) long and 4–6 mm (0.16–0.24 in) wide with a conical operculum. Flowering mainly occurs from June to November and the flowers are white. The fruit is a woody, conical to slightly bell-shaped capsule 3–8 mm (0.12–0.31 in) long and 4–8 mm (0.16–0.31 in) wide with the valves near rim level.
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