| Dalbergia sissoo | |
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Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Subfamily: | Faboideae |
| Genus: | Dalbergia |
| Species: | D. sissoo |
| Binomial name | |
| Dalbergia sissoo | |
| Synonyms[2] | |
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Dalbergia sissoo, known commonly asNorth Indian rosewood orshisham,[3] is a fast-growing, hardy,deciduousrosewood tree native to the Indian subcontinent and southern Iran.D. sissoo is a large, crooked tree with long, leathery leaves and whitish or pink flowers.
Dalbergia sissoo is a medium to large deciduous tree with a light crown, which reproduces by seeds andsuckers.[4] It can grow up to 25 m (82 ft) in height and 2 to 3 m (6 ft 7 in to 9 ft 10 in) in diameter, but is usually smaller. Trunks are often crooked when grown in the open. Leaves are leathery, alternate, pinnately compound, and about 15 cm (5.9 in) long. Flowers are whitish to pink, fragrant, nearly sessile, up to 1.5 cm (0.59 in) long, and in dense clusters 5 to 10 cm (2.0 to 3.9 in) in length. Pods are oblong, flat, thin, strap-like, 4 to 8 cm (1.6 to 3.1 in) long, 1 cm (0.39 in) wide, and light brown. They contain one to five flat, bean-shaped seeds, 8 to 10 mm (0.31 to 0.39 in) long. They have a long taproot and numerous surface roots that produce suckers. Young shoots are downy and drooping; established stems have light brown to dark gray bark, up to 2.5 cm (0.98 in) thick, shed in narrow strips; large upper branches support a spreading crown.
Dalbergia sissoo is native to the foothills of the Himalayas ranging from Afghanistan in the west toBihar, India, in the east. It also occurs naturally in Iran. It is primarily found growing along river banks above 200 m (700 ft) elevation, but can range naturally up to 1,400 m (4,600 ft).[1] The temperature in its native range is typically 10 to 40 °C (50 to 104 °F), but varies from just below freezing to nearly 50 °C (122 °F). It can withstand average annual rainfall up to 2,000 millimetres (79 in) and droughts of three to four months. Soils range from pure sand and gravel to richalluvium of river banks;shisham can grow in slightly saline soils. Seedlings are intolerant of shade.
Dalbergia sissoo is the larval food plant of theblack rajah butterfly (Charaxes solon).
It is the best known economic timber species of therosewood genus sold internationally, but it is also used as fuel wood and for shade and shelter. Afterteak, it is the most important cultivated timber tree of Bihar, which is the largest producer ofshisham timber in India. In Bihar, the tree is planted on roadsides, along canals, and as a shade tree fortea plantations. It is also commonly planted in southern Indian cities such as Bangalore as a street tree.
North Indian rosewood is usually dried before being used in furniture manufacturing, a process commonly known as seasoning. Locally, it is left in open areas to dry under the sun for about six months. Commercially, it is dried in closed chambers with hot-air circulation for about 7 to 15 days, depending on weather conditions. The ideal moisture level is around 5 to 6% for thinner pieces and up to 11% for thicker ones, depending on use. Any level lower than this can cause sudden cracking of the final products.
North Indian rosewood is among the finest cabinet andveneer timbers. It is the wood from which 'mridanga', theRajasthani percussion instrument, is often made. In addition to musical instruments, it is used forplywood, agricultural tools, flooring, as a bentwood, and for turning.
Theheartwood is golden to dark brown; thesapwood is white to pale brownish white. The heartwood is durable (itsspecific gravity is 0.7 – 0.8) and is very resistant to fungi, but the sapwood is readily attacked by dry-wood termites and borers.D. sissoo is known to contain theneoflavonoiddalbergichromene in its stem bark and heartwood.[5]
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Thecalorific value of both the sapwood and heartwood is excellent, being reported to be 4,908 kcal/kg and 5,181 kcal/kg, respectively. As a fuel wood, it is grown on a 10- to 15-year rotation. The tree has excellentcoppicing ability, although a loss of vigor after two or three rotations has been reported. The wood makes excellentcharcoal for heating and cooking.
The tree's seed oil and powdered wood are used in the treatment of skin ailments.[4]Dalbergia sissoo may also have efficacy in the treatment of stomach and blood conditions.[1]
Traditionally, slender tree twigs (calleddatun) are first chewed as atoothbrush and then split as atongue cleaner.[6] This practise has been in use in Pakistan, Africa, and the Middle East for centuries. Many of India's 80% rural population still start their day with theteeth cleaning twig either withSalvadora persicaorAzadirachta indica. In other parts of the world,shisham twigs are still collected and sold in markets for this use in rural areas.
An ethanolic extract of the fruits ofD. sissoo exhibitedmolluscicidal effects against eggs of the freshwater snailBiomphalaria pfeifferi.[7]
The juice of this plant is a potent ingredient for a mixture of wall plaster, according to theSamarāṅgaṇa Sūtradhāra, which is a Sanskrit treatise dealing with Śilpaśāstra (Hindu science of art and construction).[8]
Propagation takes place most commonly by root suckers, but also by seeds. The seeds remain viable for only a few months. Seeds should be soaked in water for 48 hours before sowing; 60% – 80% germination can be expected in 1–3 weeks. Seedlings require partial sun or full sun. In India,shisham wood trading and its uses are under government restrictions.
Common names forD. sissoo aresisu,tahli ortali, andirugudujava. Indian common names arebiradi, andsisau. Pakistani common names aresheesham/shisham andtahli in Punjabi. In Pushto its name isshewa, and inPersian, it is calledjag. InHindi andUrdu, it is calledsheesham. InBengali, it is calledsheeshoo. Local name for Indian rosewood in easternUttar Pradesh and western Bihar isseeso.
The wood ofD. sissoo is known assheesham orshisham, and is an important commercial timber.[9]
D. sisso is thestate tree of the Indian state ofPunjab.[10]
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