Melaleuca leucadendra, commonly known as Cajeput is a plant in the myrtle family, Myrtaceae and is widely distributed in northern parts of Australia (Western Australia, the Northern Territory and Queensland) and is found even more north in the Solomon Islands and on New Guinea in Papua New Guinea and Western New Guinea. It is known variously as big white paperbark, Broad leaf paperbark, Broad leaf tea tree, Brown tea tree, Butterscotch paperbark, Cajaput-tree, Cajeput, Long leaf paperbark, Paperbark, Paperbark tea tree, Paperbark-tree, River tea tree, Swamp tea tree, Weeping paperbark, Weeping tea tree, White tea tree, five-veined paperbark, Malaleuca, melaleuca, niaouli, punk-tree, tea tree and white bottle brush tree. It has also been used as a street tree in Hong Kong. It is a tree, sometimes growing to more than 20 m (70 ft.) with a trunk covered with thick, white, papery bark and weeping thinner branches. The common name, Cajeput Tree, is derived from old Indonesian spelling: kaju putih – meaning “white wood”. The actual Malay name of this tree is “gelam”, being the namesake of the Kampong Glam district in Singapore. It has a long flowering season, can flower at almost any time of the year and is often grown as a tree in parks and on roadsides. It was the first melaleuca to be described and was described from a specimen growing in Indonesia.

Plant Description

Cajeput is a moderately fast-growing small to medium-sized tree that grows more than 20 m (70 ft.) tall and 100 – 150 cm in diameter. The plant grows along streams, fringing tidal estuaries and frequently forms pure stands in freshwater swamps. It often occurs close to the beach and will tolerate wind-blown salt. The plant grows best on sandy soils but it can survive on nearly any soil type. The stem is moderately straight to crooked; the crown is narrow and open, or fairly dense. The thick, pale-colored bark is made up of many papery layers that split and peel, and on large trunks becomes rough and shaggy. Bark is very distinctive, gray to chalk-white with reddish-brown, layered, and shreddy/peeling; notably corky or spongy and thick.

Leaves

Leaves are arranged alternately, 75–270 mm (3–10 in) long, 6.5–40 mm (0.3–2 in) wide, flat, narrow egg-shaped or lance-shaped and tapering to a point. The leaves have 5 (sometimes as many as 9) longitudinal veins and are often curved or sickle-shaped. They are yellow-green to gray-green above and below, borne on a short petiole.

Flower & Fruit

White or creamy-white (rarely greenish or reddish) flowers are produced in thick, fluffy spikes. The noticeable part of each flower consists of five bundles of stamens 10-20 mm long. Spikes are solitary or 2-3 together, terminal, sometimes solitary in the uppermost 1-3 axils, and 4-8.5 cm by 2.5-3.5 cm in length. The spike grows out into a leafy twig beyond the fruits. Each inflorescence results in 30-70 densely packed woody, stalk less capsules. The capsules are short, cylindrical 3-4 mm by 4-5 mm, grey-brown, hard and persistent. Seeds are generally not released at maturity, but are heavily shed in response to a disturbance. The seeds are pale brown, very small, about 1 mm by 0.3 mm, tapering from the dorsal end. The seeds are shed through 3-4 slits positioned horizontally below the capsule rim.

Cajeput essential oil is obtained from a little branch or twig belonging to the Myrtaceae family known as Melaleuca. This oil is extracted from the leaves as well as the buds of cajeput by a process known as steam distillation. The plant, also spelt as cajeput, is found in abundance in the Far East. Cajeput essential oil is a potent antiseptic and produces a comforting effect when applied topically on the skin. As a result, this oil is extensively used in baths as well as massages, especially during the cold season.

Traditional uses and benefits of Cajeput

• Essential oil relieves spasms and expels internal parasites.
• It is used for bronchitis, tuberculosis, colds, sinusitis, gastric infections, roundworms, rheumatism, gout, acne, toothache, and skin diseases among others.
• Essential oil is expectorant, relieves spasms, increases perspiration and expels internal parasite.
• It is used internally in the treatment of bronchitis, tuberculosis, colds, sinusitis, gastric infections and roundworms.
• Externally, it is used to treat rheumatism, gout, neuralgia, acne, nasal congestion, sinusitis, toothache, chilblains and skin diseases.
• Cajeput helps the GI tract by getting rid of bacterial infections, soothing away gas, relieving constipation.
• Cajeput is very relaxing, soothing jangled nerves, and also helps those with sleeping problems get a good night’s rest.
• Cajeput helps with muscle pain, arthritis, and neuralgia… plus helps with coughs, colds, and flues.
• Cajeput is anti-inflammatory in action thus helping those afflicted with asthma and bronchitis.
• Cajeput also works to heal gums and sooth away toothaches too.
• Cajeput oil works well for eczema, fungal infections, and other skin problems.
• Traditionally, the leaves of this plant have been used for healing skin cuts, burns and infections.

Culinary Uses

• The fruits and leaves are used to make tea.
• The essential oil is used as a flavoring in items such as candy, baked goods, condiments, relishes etc.

Other facts

• Cajeput oil can be distilled from the tree’s leaves.
• Melaleuca leucadendra is cultivated as an ornamental tree for parks and gardens.
• It can be used for windbreaks and may have a role in erosion control on degraded and poor soils.
• Essential oil is used in soaps and detergents, perfumery, and insect repellents.
• Wood has been used for a wide range of purposes including mine timbers, fence posts and rails, flooring, house timbers and pulp, boat or ship building, railway ties and posts.
• Wood is an excellent fuel, and makes good quality charcoal.
• Bark is resistant to mildew, and thus it is used to insulate the walls of cold storage rooms.
• It has been used to stuff pillows and its water resistance makes it useful for caulking boats.
• Aboriginal people used strips of bark from this tree and tied them to a frame of Dodonaea branches to build huts that were waterproof.
• Bark was used to wrap food before cooking in an underground oven called a kap mari.
• Bark from trunks of very large trees was used to make bark canoes.
• Crushed leaves were used to respiratory infections and the flowers for making a sweet drink.
• In Vietnam, timber is used for poles, piles and woodchips.
• It produces a useful source of pollen and honey for apiculture.

Precautions

• High doses may cause vomiting and stomach irritation.
• Pregnant and breast feeding women should avoid using cajeput.

References:

https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=506176#null

https://davesgarden.com/guides/pf/go/117815/

https://npgsweb.ars-grin.gov/gringlobal/taxonomydetail.aspx?id=23805

https://www.pfaf.org/USER/Plant.aspx?LatinName=Melaleuca+leucadendra

https://www.botanical.com/botanical/mgmh/c/cajupt04.html

https://plants.usda.gov/core/profile?symbol=MELAL

http://www.theplantlist.org/tpl1.1/record/kew-123740

http://www.theplantlist.org/tpl/record/kew-123740

https://www.cabi.org/isc/datasheet/34348

https://en.wikipedia.org/wiki/Melaleuca_leucadendra

http://dendro.cnre.vt.edu/dendrology/syllabus/factsheet.cfm?ID=959

http://www.iucngisd.org/gisd/species.php?sc=45

https://en.wikipedia.org/wiki/Cajeput_tree

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Cajeput Quick Facts
Name:	Cajeput
Scientific Name:	Melaleuca leucadendra
Origin	Indonesia, Papua New Guinea, Northern and western Australia.
Colors	Grey-brown
Shapes	Woody capsule that is short, cylindrical 3-4 mm by 4-5 mm, hard and persistent
Taste	Pungent, sweet
Health benefits	Treat rheumatism, gout, neuralgia, acne, nasal congestion, sinusitis, toothache, chilblains and skin diseases.

Name	Cajeput
Scientific Name	Melaleuca leucadendra
Native	Indonesia, Papua New Guinea, Northern and western Australia
Common Names	Big white paperbark, Broadleaf paperbark, Broadleaf teatree, Brown teatree, Butterscotch paperbark, Cajaput-tree, Cajeput, Longleaf paperbark, Paperbark, Paperbark teatree, Paperbark-tree, River teatree, Swamp teatree, Weeping paperbark, Weeping teatree, White teatree, five-veined paperbark, Malaleuca, melaleuca, niaouli, punk-tree, tea tree, white bottlebrush tree
Name in Other Languages	Australia: Belbowrie, broadleaf paperbark, broadleaf teatree, broad-leaved paperbark, broad-leaved tea-tree, numbah, paperbark tea-tree English: Big white paperbark, Broadleaf paperbark, Broadleaf teatree, Brown teatree, Butterscotch paperbark, Cajaput-tree, Cajeput, Longleaf paperbark, Paperbark, Paperbark teatree, Paperbark-tree, River teatree, Swamp teatree, Weeping paperbark, Weeping teatree, White teatree, five-veined paperbark, Malaleuca, melaleuca, niaouli, punk-tree, tea tree, white bottlebrush tree Finnish: Valkokaarnamyrtti French: Cajeputier, niaouli German: Kajeputbaum, Mao-Holzrose, Silberbaum, Weissbaum Hindi: Cajaputi Indonesia: Kajuputih, kaya putih Italy: Cajeput Jamaica: Bottle brush Malaysia: Kayuputeh New Caledonia: Naioulia, niaouli Portuguese: Cajupúti, caxajeputi, melaleuca Puerto Rico: Balsamo de cayeput, corcho Sanskrit: Kayaputi, Kajuput Spanish: Aceite de cayeput, árbol de corcho, árbol de papel, balsamo de cayeput, calistemo blanco, cayeput, cayeputi, cayeputi australiano, corcho, corteza de papel Swedish: Kajeputträd Thailand: Samed USA: Australian paperbark tree; Australian punk tree; punktree; white bottlebrus
Plant Growth Habit	Moderately fast-growing small to medium-sized tree
Growing Climate	Grows along streams, fringing tidal estuaries and frequently forms pure stands in freshwater swamps. It often occurs close to the beach and will tolerate wind-blown salt
Soil	Grows best on sandy soils but it can survive on nearly any soil type
Plant Size	More than 20 m (70 ft.) tall and 100 – 150cm in diameter
Bark	Very distinctive, gray to chalk-white with reddish-brown, layered, and shreddy/peeling; notably corky or spongy and thick
Twigs	Slender, red-brown, aging to gray-brown
Leaf	Arranged alternately, 75–270 mm (3–10 in) long, 6.5–40 mm (0.3–2 in) wide, flat, narrow egg-shaped or lance-shaped and tapering to a point
Flowering Periods	March to July
Flower	Cream, white or greenish-white and are arranged in spikes on the ends of branches which continue to grow after flowering, sometimes on the sides of branches or in the upper leaf axils.
Fruit Shape & Size	Woody capsule that is short, cylindrical 3-4 mm by 4-5 mm, grey-brown, hard and persistent.
Fruit Color	Grey-brown
Seeds	Pale brown, asymmetric and long angular very small, about 0.6-1.2 mm long, 0.2-0.3 mm wide, 0.1-0.3 mm thick, tapering from the dorsal end. Seed shape and size vary considerably within a capsule.
Taste	Pungent, sweet
Plant Parts Used	Oil, leaves, small twigs
Season	October to November