Eucalyptus luehmanniana

Eucalyptus luehmanniana, commonly known as the yellow top mallee ash, is a species of mallee that is endemic to a small area in New South Wales. It has smooth white bark, lance-shaped to curved adult leaves, flower buds in groups of between seven and eleven or more, white flowers and cup-shaped, urn-shaped or barrel-shaped fruit. It has a restricted distribution on poor, rocky soils near Sydney.

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Eucalyptus luehmanniana is a mallee that typically grows to a height of 6–7 m (20–23 ft) and forms a lignotuber. It has smooth white to brown bark that is shed in long ribbons. Young plants and coppice regrowth have stems that are more or less square in cross-section and sessile, glossy green, elliptic to broadly lance-shaped leaves that are 70–175 mm (2.8–6.9 in) long and 30–75 mm (1.2–3.0 in) wide. Adult leaves are the same shade of glossy green on both sides, lance-shaped to curved, 100–200 mm (3.9–7.9 in) long and 20–45 mm (0.79–1.77 in) wide on a petiole 17–40 mm (0.67–1.57 in) long. The flower buds are arranged in leaf axils in groups of between seven and eleven or more on a flattened, unbranched peduncle 15–25 mm (0.59–0.98 in) long, the individual buds on pedicels 3–11 mm (0.12–0.43 in) long. Mature buds are club-shaped to diamond shaped, 6–10 mm (0.24–0.39 in) long and 4–7 mm (0.16–0.28 in) wide with a conical operculum about the same size as the floral cup. Flowering occurs between June and December and the flowers are white. The fruit is a woody, cup-shaped, urn-shaped or barrel-shaped capsule 8–13 mm (0.31–0.51 in) long and 9–12 mm (0.35–0.47 in) wide with the valves close to rim level. This mallee has sometimes been confused with the tree species E. haemastoma and E. stricta.