Dysoxylum rufum is a rainforest tree in the Mahogany family, found in eastern Australia. It occurs on a variety of different soils and rainforest types. From as far south as Bulahdelah, New South Wales to the McIlwraith Range in far north eastern Australia. The specific epithet rufum refers to the rusty red of the leaf, fruit and flower hairs of this species.
Dysoxylum rufum is known variously by the common names Australian mahogany, bastard pencil cedar, false rosewood, hairy rosewood, rusty mahogany, red bean, red heart, and rusty bean.
Usually a small to medium-sized tree. Though it reaches 40 metres tall with a stem diameter of 90 cm at Murray Scrub.
Leaflets are nearly opposite on the stem, without serrations. Asymmetrical at the leaf base. Leaflets 5 to 17 cm long. Lanceolate to broad lanceolate in shape with a fine point at the leaf tip. Unusually, the leaflets are a dull green above the leaf, and a brighter green below. Hairy under the leaf. Leaflet stalks 2 to 3 mm long, but much longer for the terminal leaflet, where it is up to 25 mm long. The compound leaf contains around 19 leaflets. With a stalk 4 to 10 cm long.
Flowers, fruit and regeneration
Pleasantly scented white flowers form on panicles from December to February. The panicles form from the leaf axils. And when mature, the flower scent becomes less pleasant. The flower calyx is hairy.
The fruit is a round yellowish capsule, around 2 cm in diameter, mostly five-valved. Also covered with hairs which can irritate the skin. Seeds inside the capsule are cream, irregular in shape, and about 5 mm in diameter. Fruit ripens from April to December. Regeneration from fresh seed is relatively swift and reliable, taking as little as three weeks. After eight weeks, germination should be complete with good results.
Onion scented wood. Mostly white with a red heartwood core which resembles the related Red Bean. Timber is vulnerable to attack from the lyctus borer.
- ^ (NOTE: Tropicos does not include Achille Richard as the basionym author, though he is attested as such by many authorities.) The taxon Dysoxylum rufum [from its basionym Hartighsea rufa] was published in Flora Australiensis: A Description of the Plants of Australia 1: 382. 1863. "Name - Dysoxylum rufum Benth". Tropicos. Saint Louis, Missouri: Missouri Botanical Garden. Retrieved 6 Mar 2013.
- ^ Hartighsea rufa (the basionym of Dysoxylum rufum) was first described and published in Sertum Astrolabianum. Voyage de Decouvertes de l'Astrolabe. Botanique 2.: 29, t. 11 (1834) "Meliaceae Hartighsea rufa A.Rich". Australian Plant Name Index. IBIS, Australian National Botanic Gardens, and Australian National Herbarium. Retrieved 6 Mar 2013.
- ^ a b Taylor, J.; Harden, G. J. (1991). "Dysoxylum rufum – New South Wales Flora Online". PlantNET - The Plant Information Network System. 2.0. Sydney, Australia: The Royal Botanic Gardens and Domain Trust. Retrieved 13 Mar 2013.
- ^ a b Floyd, A.G., Rainforest Trees of Mainland South-eastern Australia, Inkata Press 2008, ISBN 978-0-9589436-7-3 page 220
- ^ a b c Hyland, B. P. M.; Whiffin, T.; Zich, F. A.; et al. (Dec 2010). "Factsheet – Dysoxylum rufum". Australian Tropical Rainforest Plants. Edition 6.1, online version [RFK 6.1]. Cairns, Australia: Commonwealth Scientific and Industrial Research Organisation (CSIRO), through its Division of Plant Industry; the Centre for Australian National Biodiversity Research; the Australian Tropical Herbarium, James Cook University. Retrieved 13 Mar 2013.
- ^ "TPL, treatment of Dysoxylum rufum". The Plant List; Version 1. (published on the internet). Royal Botanic Gardens, Kew and the Missouri Botanical Garden. 2010. Retrieved 6 Mar 2013.