Haematoxylum campechianum L.

A small, bushy tree up to 15 m tall, but usually smaller, often thorny and gnarled; trunk irregularly fluted and contorted, attaining a length of 2-3 m and a diameter of 60 cm, although usually much less, prolonged into large, rather long and straight branches, bark grey to brown, rather smooth, peeling in flakes. Leaves alternate, paripinnate, distichous or fascicled on very short branches; stipules partly spine-like; leaflets in 2-4 pairs, obcordate or obovate, 10-35 mm x 5-25 mm, acute at base, emarginate at apex, closely veined and glabrous. Flowers in 5-20 cm long racemes in the axils of present or fallen leaves, 5-merous, sweet-scented; calyx 4-5 mm long, deeply lobed; petals 5-7 mm long, bright yellow; stamens 10, free; ovary superior, shortly stalked, glabrous; style filiform. Fruit a lanceolate, extremely flattened pod, 3-5 cm long, pointed at both ends, dehiscent not along the sutures but along the median of the sides, usually 2-seeded. Haematoxylum L. ('bloodwood') is a small genus with about 4 species. It is indigenous to Central America and southern Africa. In Central America 2 species are usually distinguished, both producing a dye in the wood. Only H. campechianum has spread over most of the tropics. In Central America logwood trees which do not produce haematoxylin have been found. They are referred as 'bastard logwood'.

Logwood prefers light soils with some humus.

Logwood is a lowland species which may grow under very different conditions. In Central America it grows best in flat marshy areas often inundated by rivers. In the West Indies, the best wood is common on exposed limestone hillsides in dry secondary thickets.

Logwood is cultivated on very limited scale in Malaysia (Penang), Indonesia (Java), and the Philippines.

Logwood is propagated by seed or cuttings.

Boundary or barrier or support: In South-East Asia, and also in India, logwood is only occasionally cultivated as hedge plant, not for production of dyewood. Logwood may be grown in gardens as a hedge, or for its delicate foliage and fragrants flowers. Apiculture: The flowers are the source of a very good honey.

Tannin or dyestuff: The main product of the tree is the hearthwood; it is the logwood commerce. This wood yields a series of dyes in darker tints of grey, brown, violet, blue and black. The dyes give a fairly permanent colour to several fabrics such as silk, wool, and sometimes cotton, but also to synthetics such as nylon and rayon. They may be used to dye leather as well as fur, feathers, paper and bone, and also in the manufacture of inks. Haematoxylin, the colouring agent of logwood, is a histological stain used for staining cell nuclei; alcoholic solutions serve as indicator for alkaloid titration. Timber: As timber its use is largely limited by the irregularity of the trunk. The wood is strong but brittle; it is durable for use outdoors and in contact with the ground. It is sometimes used for furniture and fancy articles because it may be finished to a very smooth surface and takes a high polish. Medicine: Medicinally it is a mild astringent and tonic it is prescribed in the form of a decoction and liquid extract. It is also useful against diarrhoea, dysentery, atonic dyspepsia and leucorrhoea. An ointment prepared from the wood is said to be useful against cancer and hospital gangrene. Haematoxylin has been shown to possess anti-flammatory properties. Fuel: The wood burns readily.