Eucalyptus ovata, commonly known as swamp gumorblack gum,[3] is a small to medium-sized tree species 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.[3][4][5][6][7]
In 1916, Joseph Maiden described two varieties of E. ovata in his book, A Critical Revision of the Genus Eucalyptus, and the names have been accepted by the Australian Plant Census:
Eucalyptus ovata var. grandifloraMaiden;[10][11]: 146, 155
Eucalyptus ovata Labill. var. ovata.[11]: 148 [12]
Swamp gum is widespread in south-eastern Australia and is found from the western end of Kangaroo Island and the southern Mount Lofty ranges in the south-east of South Australia, to Tasmania, the southern half of Victoria and to south-eastern New South Wales as far north as Oberon and Hill Top. It grows in grassy woodland in low, temporarily or permanently damp sites.[3][4][5][7]
^ abcd"Eucalyptus ovata". Euclid: Centre for Australian National Biodiversity Research. Retrieved 31 May 2020.
^ abBrooker, M. Ian H.; Slee, Andrew V. "Eucalyptus ovata". Royal Botanic Gardens, Victoria. Retrieved 24 November 2019.
^ abHill, K. "Eucalyptus ovata Labill". PlantNET. National Herbarium of New South Wales. Retrieved 10 February 2009.
^Brooker & Kleinig, Field Guide to Eucalypts, Vol 2 South Western and Southern Australia, Bloomings Books, Melbourne, 2001, ISBN1-876473-28-2
^ abChippendale, George M. "Eucalyptus ovata". Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 24 November 2019.
