IRON-WOOD, the name applied to several kinds of timber, the produce of trees from different parts of the tropics, and belong ing to very different natural families. Usually the wood is extremely hard, dense and dark-coloured, and sinks in water. Several species of Sideroxylon (Sapotaceae) yield iron-wood, Sideroxylon cinereum or Bojerianum being the bois de fer blanc of Africa and Mauritius, and the name is also given to species of Metrosideros (Myrtaceae) and Diospyros (Ebenaceae).
West Indian iron-wood is the produce of Colubrina reclinata and C. ferruginosa (Rhamnaceae), and of Aegiphila martinicensis (Verbenaceae). Ixora triflorum (Rubiaceae) is the bois de fer of Martinique, and Zanthoxyluin Pterota (Rutaceae) is the iron-wood of Jamaica, while Robinia Ponacoco (Leguminosae) is described as the iron-wood of Guiana. The iron-wood of India and Ceylon is the produce of Mesua ferrea (Guttiferae). The iron-wood tree of Pegu and Arracan is Xylia dolabriformis (Leguminosae) , described as the most important timber-tree of Burma after teak, and known as pyingado. The endemic bois de fer of Mauritius, once frequent in the primeval woods, but now becoming very scarce, is Stadt mannia Sideroxylon (Sapindaceae), while Cossignya pinnata is known as the bois de fer de Judas. In Australia species of Acacia,
Casuarina, Eucalyptus, Melaleuca, Myrtus, and other genera are known more or less widely as iron-wood. Tasmanian iron-wood is the produce of Notelaea ligustrina (Oleaceae), and is chiefly used for making ships' blocks. The iron-wood or lever-wood chiefly used in North America is the timber of the American hop hornbeam, Ostrya virginica (Betulaceae). In the United States various other trees are also known as iron-wood, as the desert iron-wood (Olneya Tesota), of south-western deserts; the Catalina iron-wood (Lyo nothamnus floribundus), of southern California islands ; the south ern iron-wood (Bumelia lycioides) , of the south-eastern States, and several subtropical trees found near the coast from Florida to Texas. In Brazil Apuleia ferrea and Caesalpinia ferrea (both Leguminosae) yield a kind of iron-wood, called, however, the Pao ferro or false iron-wood.