Eucalyptus arachnaea (Eucalyptus arachnaea)
Description
Bark rough, grey-black for up to 2.5 m of trunks, tightly fibrous and fissured to flaky, smooth above, grey and yellowish brown. Branchlets with pith oil glands at the nodes. Juvenile growth (coppice or field seedlings to 50 cm): stems triangular in cross-section when young, soon rounded, warty; juvenile leaves always petiolate, opposite for ca 3 nodes then alternate, ovate, 5.5-9 cm long, 3-5.5 cm wide, base tapered or truncate to rounded, blue-green to slightly glaucous. Adult leaves alternate, petioles 0.8-2 cm long; blade lanceolate, 6-12 cm long, 1-2.2 cm wide, base tapering to petiole, margin entire apex pointed, concolorous, very glossy, green, side-veins greater than 45° to midrib, reticulation moderate to dense, intramarginal vein remote from margin, oil glands mostly island. Inflorescences axillary unbranched, peduncles widening apically, 0.8-1.8 cm long; buds 11 to 15, pedicellate, elongated-fusiform, scar present, operculum horn-shaped, three to four times the length of the hypanthium and narrower than it at the join, a few outer stamens erect, most deflexed to varying extent, anthers oblong, versatile, dorsifixed, dehiscing by longitudinal slits, style long and straight, stigma more or less tapered, locules 3, the placentae each with 4 vertical rows of ovules; flowers creamy white. Fruit pedicellate, cylindrical to obconical, 0.4-0.5 cm wide, disc descending vertically, valves 3, near rim level or tips scarcely exserted. Seed straw-coloured, 0.8-1.2 mm, sub-spherical, surface smooth, hilum ventral/terminal.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum:
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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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