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Eucalyptus diversicolor
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Eucalyptus diversicolor
Eucalyptus diversicolor, commonly known as karri, is a species of flowering plant in the family Myrtaceae and is endemic to the south-west of Western Australia. It is a tall tree with smooth light grey to cream-coloured, often mottled bark, lance-shaped adult leaves and barrel-shaped fruit. Found in higher rainfall areas, karri is commercially important for its timber.
Eucalyptus diversicolor is the tallest tree that grows in Western Australia. It is a tall forest tree that typically grows to a height of 10–60 m (33–197 ft) but can reach as high as 90 m (300 ft), making it the tallest tree in Western Australia and one of the tallest in the world. As of February 2019, the tallest known living karri is just over 80 m (260 ft) tall. A tree south of Pemberton, known as 'The Tyrant' is 69 m (226 ft) tall and 11.5 m (38 ft) in girth and contains approximately 220 m3 (7,800 cu ft) of wood in its trunk and is thought to be the largest karri by wood volume. A Eucalyptus diversicolor of 72.9 m (239 ft) height and of 5.71 m (18.7 ft) girth in Coimbra, Portugal, is the tallest reliably measured tree in Europe.
Karri do not form a lignotuber but do form epicormic buds located under the bark along the length of the stem.
The bark on the trunk and branches is smooth, grey to cream-coloured or pale orange, often mottled and is shed in larger plates, short ribbons or small polygonal flakes. The bark sheds each year with the new white bark contrasting with the orange to yellow new bark contrasts against the recently exposed white bark. The bark becomes increasingly granulated with age. The bark is rich in tannins.
The stems and branchlets are round in cross section, the branchlets have no oil glands in the pith.
The leaves on young plants and on coppice regrowth are arranged in opposite pairs, broadly egg-shaped to almost round, paler on the lower surface, 50–155 mm (2.0–6.1 in) long, 25–100 mm (0.98–3.94 in) wide and petiolate. The leaves tend to be more spreading than pendulous. Adult leaves are arranged alternately, glossy dark green on the upper surface, paler below, lance-shaped, 70–135 mm (2.8–5.3 in) long and 15–37 mm (0.59–1.46 in) wide on a flattened or channelled petiole 10–20 mm (0.39–0.79 in) long. The leaves are penniveined, where the veins arise pinnately, in a feather like arrangement, from a single primary vein. The leaves are densely reticulated where the network of veins within the leaf is packed closely together. The prominent vein near the margin of the leaf is very close to the margin and runs almost parallel with it. The yellow oil glands within the leaves are situated in centre of the smallest unreticulated areas. The fine lateral nerves spread at a wide angle from the midrib.
The unbranched inflorescences are situated in the axils in small clusters on a common stalk. The flower buds are arranged in groups of seven in leaf axils on a rounded peduncle 12–30 mm (0.47–1.18 in) long, each bud on a pedicel 3–6 mm (0.12–0.24 in) long. The buds are oval, 11–16 mm (0.43–0.63 in) long and 5–7 mm (0.20–0.28 in) wide at maturity with a conical operculum. Flowering has been observed in January, April, May, August and December, and the flowers are white. The flowers have narrow cylindrical calyx tubes that slowly taper to the base into the pedicel. The many stamen form a continuous ring and has inflected white coloured filaments. The anthers at the end of the filaments have an oblong shape and open into a parallel longitudinal slits.
The fruit is a woody barrel-shaped capsule 10–12 mm (0.39–0.47 in) long and 8–10 mm (0.31–0.39 in) wide on a pedicel 5–6 mm (0.20–0.24 in) long with three valves at or below rim level.
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Eucalyptus diversicolor
Eucalyptus diversicolor, commonly known as karri, is a species of flowering plant in the family Myrtaceae and is endemic to the south-west of Western Australia. It is a tall tree with smooth light grey to cream-coloured, often mottled bark, lance-shaped adult leaves and barrel-shaped fruit. Found in higher rainfall areas, karri is commercially important for its timber.
Eucalyptus diversicolor is the tallest tree that grows in Western Australia. It is a tall forest tree that typically grows to a height of 10–60 m (33–197 ft) but can reach as high as 90 m (300 ft), making it the tallest tree in Western Australia and one of the tallest in the world. As of February 2019, the tallest known living karri is just over 80 m (260 ft) tall. A tree south of Pemberton, known as 'The Tyrant' is 69 m (226 ft) tall and 11.5 m (38 ft) in girth and contains approximately 220 m3 (7,800 cu ft) of wood in its trunk and is thought to be the largest karri by wood volume. A Eucalyptus diversicolor of 72.9 m (239 ft) height and of 5.71 m (18.7 ft) girth in Coimbra, Portugal, is the tallest reliably measured tree in Europe.
Karri do not form a lignotuber but do form epicormic buds located under the bark along the length of the stem.
The bark on the trunk and branches is smooth, grey to cream-coloured or pale orange, often mottled and is shed in larger plates, short ribbons or small polygonal flakes. The bark sheds each year with the new white bark contrasting with the orange to yellow new bark contrasts against the recently exposed white bark. The bark becomes increasingly granulated with age. The bark is rich in tannins.
The stems and branchlets are round in cross section, the branchlets have no oil glands in the pith.
The leaves on young plants and on coppice regrowth are arranged in opposite pairs, broadly egg-shaped to almost round, paler on the lower surface, 50–155 mm (2.0–6.1 in) long, 25–100 mm (0.98–3.94 in) wide and petiolate. The leaves tend to be more spreading than pendulous. Adult leaves are arranged alternately, glossy dark green on the upper surface, paler below, lance-shaped, 70–135 mm (2.8–5.3 in) long and 15–37 mm (0.59–1.46 in) wide on a flattened or channelled petiole 10–20 mm (0.39–0.79 in) long. The leaves are penniveined, where the veins arise pinnately, in a feather like arrangement, from a single primary vein. The leaves are densely reticulated where the network of veins within the leaf is packed closely together. The prominent vein near the margin of the leaf is very close to the margin and runs almost parallel with it. The yellow oil glands within the leaves are situated in centre of the smallest unreticulated areas. The fine lateral nerves spread at a wide angle from the midrib.
The unbranched inflorescences are situated in the axils in small clusters on a common stalk. The flower buds are arranged in groups of seven in leaf axils on a rounded peduncle 12–30 mm (0.47–1.18 in) long, each bud on a pedicel 3–6 mm (0.12–0.24 in) long. The buds are oval, 11–16 mm (0.43–0.63 in) long and 5–7 mm (0.20–0.28 in) wide at maturity with a conical operculum. Flowering has been observed in January, April, May, August and December, and the flowers are white. The flowers have narrow cylindrical calyx tubes that slowly taper to the base into the pedicel. The many stamen form a continuous ring and has inflected white coloured filaments. The anthers at the end of the filaments have an oblong shape and open into a parallel longitudinal slits.
The fruit is a woody barrel-shaped capsule 10–12 mm (0.39–0.47 in) long and 8–10 mm (0.31–0.39 in) wide on a pedicel 5–6 mm (0.20–0.24 in) long with three valves at or below rim level.
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