Australian Tropical Rainforest Plants - Online edition
Backhousia kingii Guymer
Guymer, G.P. (1988) Austrobaileya 2(5): 567. Type: Queensland. Port Curtis District: Along Moore Ck, 23°20′S, 150°33′E, ca 2 km N of Rockhampton, 14 April 1985, E.R. Anderson 3976 (holo: BRI).
Tree up to 20 metres; bark pale brown to grey, smooth, shed in strips.
Strongly aromatic when crushed. Leaves opposite, new growth reddish and decussate; small linear axillary stipules that fall early leaving scars that may be difficult to discern; blades broadly elliptic to ovate or obovate, entire, glabrous, 2-6 cm long, 1.2-3.5 cm wide; pinnately veined with 5-7 main laterals each side of midvein; apex obtuse to rounded; base cuneate to attenuate; midvein shallowly channelled above, raised below; petioles short, 2-4 mm; oil glands dense and obvious.
Flowers arranged in upper axils in many flowered 8-20 umbels or panicles; pedicels, peduncles and outside of hypanthium puberulent; sepals 4 (or 5), green, turning brown, outer pair slightly larger, persistent in the fruit; petals 4 (or 5), longer than sepals, white to cream, deciduous early; stamens numerous, free, longer than sepals; anthers small, versatile, dorsifixed; gynoecium half-inferior with 2 locules each with 2-4 ovules, and surrounded by thinly pubescent hypanthium.
Fruit dry, brown, indehiscent, enclosed by persistent hypanthium with spreading sepals; locules 2, each with 2-4 pale brown seeds about 2 mm long.
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Ref.: Harden et al (2014)