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Botany · Ch 10 — Economically Useful Plants & Entrepreneurial Botany

Timber

10.4

Timber

Timber trees answer the basic human need for shelter, and this section works through three of the most important ones. Teak (Tectona grandis, family Lamiaceae) is native to South East Asia, occurring wild in Assam but cultivated across Bengal, Assam, Kerala, Tamil Nadu and North-West India; it is regarded as one of the world's finest timbers, with golden-yellow to golden-brown heartwood that darkens with light exposure, prized for its durability, its resistance to termites and fungal attack, and its carpenter-friendly refusal to split or crack — properties that made it the traditional wood for railway carriages and wagons, ships, bridges, boats, toys, plywood and door frames. Rosewood (Dalbergia latifolia, family Fabaceae), native to India and grown across Uttar Pradesh, Bihar, Odisha and Central, Western and Southern India, has yellowish sapwood and a dull-brown-to-purple heartwood, fragrant, heavy, narrowly interlocked-grained and durable enough for underwater use; it is worked into furniture, army wagons, temple chariots, cabinets, railway sleepers, musical instruments, hammer handles, shoe heels and tobacco pipes. Ebony (Diospyros ebenum, family Ebenaceae), found in the tropical forests of Southern India and Sri Lanka and distributed across Karnataka, Kerala and Tamil Nadu, has a jet-black, metallic-lustred heartwood, r …

Figure 10.15Figure 10.15: Timber

What this figure shows. A two-panel photographic plate of the timber products described in the text. The Rosewood panel shows a cut cross-section or plank of Dalbergia latifolia timber, displaying the wood's dull brown to almost purple heartwood with visible narrow interlocked grain lines, contrasted against its paler yellowish sapwood edge. The 'Teak wood carving' panel shows an item carved from Tectona grandis heartwood — its golden-yellow-to-golden-brown colour, which darkens on exposure to light, is visible in the carved surface, illustrating why the …