Grand Eucalyptus (Eucalyptus grandis)
Description
Eucalyptus grandis grows as a straight and tall forest tree, reaching around 50 m (160 ft) tall,with a dbh of 1.2 to 2 m (3.9 to 6.6 ft). The biggest trees can reach 75 m (246 ft) high and 3 m (9.8 ft) dbh,the tallest recorded known as "The Grandis" near Bulahdelah, with a height of 86 m (282 ft) and a girth of 8.5 m (28 ft).The bole is straight for 2/3rds to 3/4 the height of the tree. The bark is smooth and powdery, pale- or blue-grey to white in colour, with a skirt of rough brownish bark for the bottom 1-4 m of the tree trunk.The glossy dark green leaves are stalked, lanceolate to broad lanceolate, and paler on their undersides, 10 to 16 cm (3.9 to 6.3 in) long and 2-3 cm (0.79-1.18 in) wide. They are arranged alternately along the branches.The secondary veins arise off the leaf midvein at a wide angle (61 degrees), and the leaf is dotted with around 800 oil glands per square centimetre.The white flowers appear from mid autumn to late winter from April to August, and are arranged in groups of seven to eleven flowerheads.The flowers are followed by small pear- or cone-shaped gumnuts which measure 5-8 mm in length and 4-7 mm across.The Sydney blue gum (E saligna) is very similar in appearance and overlaps E. grandis in the southern part of its range, but has narrower leaves and more bell-shaped gumnuts with protruding valves.It also has a lignotuber. The mountain blue gum (E. deanei) can be distinguished by its entirely smooth bark and wider adult leaves.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Magnoliophyta
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Class: Magnoliopsida
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Order: Myrtales
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Family: Myrtaceae
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Genus: Eucalyptus
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